Rating of the best knives and discs for trimmers for 2022

A trimmer (also known as a lawn mower) is a popular household device, its functionality more reminiscent of a lawn mower. The tool itself has a certain compactness and lightness; with its help it is quite easy to mow fairly small areas of grass, including thickets near tree trunks, fences and other inaccessible places. The trimmer is perfect for mowing young growth and dead wood (including tall weeds), as well as for processing well-groomed and soft grass on the lawn. The main thing in this whole matter is to choose the right disc for this tool.

Types of trimmers

According to the type of source of energy supply, the instruments under consideration are divided into:

• Gasoline - they are convenient for processing fairly large areas, because they have increased power. In addition, it is possible to install various additional attachments on them, which help loosen the soil, trim small twigs and branches, and can also be used to treat tree crowns and give shrubs a neat appearance. The disadvantages of such equipment include their increased weight, noisy operation and poor adaptability to functioning in humid conditions (for example, mowing grass covered with morning dew).
• Electric - these devices are easy to use due to their low weight. However, their range of action is small and will always depend on the location of an electrical outlet nearby.
• Rechargeable ones are probably the most mobile and maneuverable option, because they can work far from a power source. But here everything depends on the amount of electrical charge of the battery - even the latest models generate a full charge in a maximum of 20 minutes. But recharging them can take several hours.

Using Trimmer Discs

As mentioned above, gasoline models have higher cutting power, so it is preferable to use steel or heavy plastic discs. For other samples, light blade knives or light plastic knives are often used. Such cutting devices will not greatly burden a low-power electric or battery-powered device.

However, the use of one or another type of knives will not always depend on the power of the equipment. An important role in this case will be played by the transmission mechanism, which can be either rigid or flexible. In devices in which a rigid mechanism is installed, rotation is carried out through a shaft, and in models with a flexible mechanism, this process takes place through a steel cable. Thus, if you install a heavy steel disk in a device with a flexible cable, then extreme loads will occur on it, and the entire structure will quickly become unusable. Therefore, in a brush cutter that uses a flexible gear, only plastic discs or even fishing line are installed. To find out the type of transmission, just look at the instructions. However, you can determine it “by eye” - if the trimmer has a curved rod, then it uses 100% flexible transmission.

IMPORTANT! It is imperative to decide on the type of transmission before purchasing a knife!

Disc material

Steel wheels often use either alloy tool steel or a carbon tool steel. It may also have soldering made of pobedit on the blades and teeth. Steel knives are often installed on professional equipment capable of mowing any grass, young growth, and even small trees with a trunk no more than 70 mm. Plastic knives are suitable for household use; they can mow low weeds, but are better suited for regular lawn mowing.

IMPORTANT! It is worth remembering that plastic cutters are not suitable for young growth!

Knife design

Lobed - they have 2-4 blades, but sometimes there may be more. They are lighter in weight than gear ones, have a lower inertial moment and load the engine and the transmission mechanism of the device extremely little. There are specific areas of use for them:

• Harvesting hay.
• Lawn mowing.
• Removal of small weeds.

It is highly advisable to work with blade discs only on soft grass of the same type, because the grass flies away from the blade when mowed. When using three-blade models, the trimmer will chop the grass more finely; accordingly, this option can work on tall grass. The four-bladed version will cope well with small haymaking.

Blade knives are most often found in practical use in dachas and small garden plots - the optimal choice for such purposes is an electric trimmer with a plastic or small steel knife.

Toothed - they will find their use if it is necessary to frequently mow young growth and small trees. The teeth on the disk are arranged in the form of small pointed protrusions. Their number can range from 20 to 80 pieces. This shows that the more teeth there are on the disk, the more complex the operation it is capable of performing (for example, the more teeth, the easier it is to cut down a tree).

Choosing the best cutting knife for a lawn mower

Some manufacturers of trimmers with a rigid transmission shaft design additionally equip their tools with not only fishing lines, but also steel discs. This does not always happen, and if such a situation is appropriate, then, if necessary, a metal disk is installed instead of the mowing head with fishing line. However, this is not always the case. First, you need to make sure that you can use a steel disc on the trimmer. Let's consider all types and designs of cutting knives produced for trimmers.

This is interesting!
The mounting hole size on all metal discs is 25.4 mm or 1 inch. Models with a larger diameter are rare, and to use them you will need to use an adapter.

Disk selection problems

In cases where it is necessary to mow the lawn and standard weeds (no more than once a month), an 8-tooth disc will be the best choice. If you plan to process tall grass, a disc with 24 teeth is optimal (the mown plants practically do not wrap around them). Still, professionals advise having several different disks in stock, each of which will be intended for a specific job. In addition, when using electric tools, it is preferable to use knives with holes - they themselves are lighter and, accordingly, load less on the electric motor of the equipment.

For daily work in the professional segment of activity, it is better to use disks made of alloy steel and having pobedite soldering. The ideal option is when the entire circle is made directly from pobedite. Regarding the price tag: the discs themselves are not complex devices and therefore even a Chinese model for 400-700 rubles can last for a couple of seasons. But branded models, the cost of which starts from 1,500 rubles, will last for more than five years (provided they are properly cared for).

In what cases is a serrated disc knife used?

Metal toothed disks have the shape of a circle, along the base of which the corresponding number of teeth are located. These teeth come in different types, shapes and sizes. The more teeth, the more effectively the tool copes with thick grass and even small trees. Milling wheels for trimmers gain speed faster, which is their advantage. They also have a high moment of inertia, which is their disadvantage. This negatively affects the driving device of the tool, as the starting power increases, and as a result, the motor overheats during frequent stops. In addition, the equipment differs in the presence and absence of perforation.

1. Perforated wheels with holes and a large number of teeth, up to 40 teeth, effectively cope with mowing thick, tall and small, coarse grass and shrubs.
   The greater the number of teeth, the less the grass is crushed. Circles with a large number of teeth do not get grass wrapped around them. Discs with teeth in the amount of 60-80 pieces are intended for mowing grass with small trees existing on the territory, the thickness of the stems does not exceed 7 cm

2. Solid - discs that do not have holes in the structure.
   They are heavy, so installing them on lawn mowers with an engine capacity of up to 30 cm3 is strictly not recommended. The tool simply will not be able to pull out the heavy cutting element. Compared to perforated ones, they weigh 1.5-2 times more. Effectively cope with thick and sparse grass. The smaller the number of knives, the more the grass is chopped, and at the same time the load on the motor increases. The load on the gearbox also depends on the angle of sharpening of the teeth.

If the operator is faced with the task of mowing thick grass and dead wood, it is recommended to choose discs with perforations and a large number of teeth. Solid discs are suitable for cutting green grass of different densities, but they are used exclusively on powerful lawn mowers with an engine capacity of more than 40 cm3.

This is interesting!
Pobedit-tipped milling discs allow you to mow grass close to existing obstacles. For cutting grass for hay, it is recommended to use steel ones with a large number of teeth. The smooth sharpening of the teeth on these knives allows you to effectively cut grass. For cutting thick-stemmed plants (raspberries, ragweed), solid discs with a number of knives of 16, 24 and 32, as well as perforated ones with any number of teeth, are used.

Making your own knife

The easiest way to build a disc for a trimmer is in its paddle design. For this you will need:

• A piece of pipe (preferably copper rather than steel) with a suitable diameter - an adapter sleeve for the output part of the flexible shaft will be made from it.
• Steel sheet no more than a millimeter thick (for making a washer).
• Standard cotter pin (GOST 297-66) (fastening the base to the shaft).
• Stainless steel strips (thickness from 1 to 1.2 mm) (the knife blades themselves).
• Fastening element (it is preferable to use rivets rather than nuts/screws, even if they are included as spare parts with the device).

Manufacturing sequence:

• First, you need to mark the general dimensions of the device so that when cutting they do not extend beyond the protective casing. After which you can begin making the sleeve from the pipe.
• In order to improve the fit, the bushing is made split and seated along the outer surface of the trimmer shaft. Due to the fact that the diameter of the washer can only be determined by the dimensions of the available space, it is also possible to select a washer from the most approximate standard sizes.
• The washer must be welded to the bushing so that the resulting leg along the seam takes up a minimum of space.
• It is better to make the blades on a milling machine, paying special attention to sharp edges and corners - they should not bend excessively during their subsequent sharpening.
• Rivet fastenings with a slight vertical play will allow for high-quality cutting, especially from dead wood.
• In order to prevent the blades from rubbing in the event of their possible expansion from heat, you need to carefully check the presence of gaps (at least 1.5 millimeters) between the blades and the pipe.
• The last step is to securely secure the entire structure to the shaft using a cotter pin.

Difficulties in choosing between fishing line and knife

The line is used for short and soft grass; for taller grass, with clearly tough and old stems, it is better to use a knife. In a set of branded trimmer models, these two cutting tools are usually included in advance. Depending on the frequency of use of a particular element, branded models, as a rule, last at least 5 seasons.

Correct selection of fishing line

Fishing line is considered to be not a very reliable cutting tool, because it can easily get caught on glass, stone, thick branch and tear. Therefore, before choosing a fishing line, you need to decide on its thickness. Typically, the thickness is specified in the instructions, which also outline its functional features. A standard fishing line has a diameter of 1-1.4 millimeters, but its proper selection will always depend on the power of the mowing machine itself. As a rule, a normal package contains 15 meters of scaffolding material. It will last for 5-10 uses. At the same time, there are also enlarged coils, in which the wire length is about 200 meters.

IMPORTANT! It is necessary to pay close attention to the date of manufacture of the fishing line, because the older it is, the faster it will break!

Forms of forest section

This parameter will depend on the type of grass. Round fishing line is characterized by increased strength and is suitable for almost all types of vegetation. But it makes quite a lot of noise when working, so in order to work with it in relative comfort, you need to use earplugs or construction headphones.

The scaffolding material can be shaped and have a cross-section in the shape of a star, square or polyhedron. This thread should be used when clearing the earth cover of thick and hard stems, especially since the noise from it is quite low. At the same time, it is worth mentioning that its increased efficiency lies in the fact that it has sharp corners, hence the ability to efficiently cut dry grass. However, such a thread breaks much more often.

Correct choice of fishing line diameter

For grass cover of varying softness/freshness, you will need a special fishing line diameter. However, this does not mean that a thick cord (line) can be installed on any mowing machine, regardless of its power limits. Before such installation, be sure to familiarize yourself with the recommended characteristics that are indicated in the instructions. As an example, we can outline the following situation: an attempt to wind a 2-mm cord on a device that is designed to work with a thread no larger than 1.2 millimeters will invariably lead to breakdown of the entire equipment, because the engine will inevitably overheat.

Based on the thickness of the diameter, the cord can be divided into the following sizes:

• 1.2-1.6 millimeters – thin. Ideal for maintaining a small lawn, including infrequent mowing. The power of mowing equipment can range from 0.5 to 0.7 kW.
• 2-2.4 millimeters is the most popular material option. It is used in medium-power equipment, which is extremely common among avid summer residents. It copes equally well with withered grass and young growth.
• 3-3.2 millimeters - considered the choice of professionals; it is usually installed on powerful gasoline scythes; it copes with coarse dead wood and weeds without any problems.
• 4 millimeters is the thickest available, and even has some aluminum added to it to strengthen the material. It has very clear restrictions on engine power, which is why it is rarely used and only against weeds with a strong root system.

IMPORTANT! As a rule, the manufacturer paints the fishing line in certain colors (from softer to more aggressive, for example, from green to red) to make it visually easier for a potential buyer to understand the thickness of the cord.

Line material

The standard material for the manufacture of cord is nylon, which is characterized by special flexibility and strength and is able to withstand changes in operating temperatures and load volumes. Also, there are threads with a metal core - they are about 30 percent stronger than nylon and are less susceptible to wear. Works great in tall grass. Regarding price variability: nylon will cost about 100 rubles, and material with metal inclusions will cost from 800 rubles.

Instructions for replacing a disk on a lawn mower with a step-by-step description

Having understood the design of cutting knives, it remains to find out the process of replacing them and installing them on the tool. If the lawn mower has a head with a fishing line, and you plan to install a metal disk, then no modifications to the design will be necessary.

To install a metal disc on the trimmer, you must follow the following instructions:

1. To begin, remove the plastic protective casing - not necessary. Depending on the tool model, the dismantling process may vary. If the trimmer has a metal casing, then there is no need to remove it. The plastic casing is removed in order to install the metal

2. Using a special hex key or screwdriver, you need to lock the gearbox. The hole for blocking the shaft can be located on the side or on the end side

3. The mowing head or spool, if installed, is unscrewed from the tool

4. A disk is installed in place of the head or spool. The inner diameter of the disk should be located in a special groove. The nozzle is installed so that the front side (with the letters) faces up

5. After installing the disk, a locking washer of the appropriate size is installed. After this, the fastening nut is screwed in, having previously blocked the gearbox shaft. The direction of rotation for screwing the fastening nut is counterclockwise

6. After completing the work, it is necessary to install a protective metal casing. If it is not there, you should leave the plastic casing

As you can see, the procedure for replacing the disc on the trimmer is not at all difficult and takes no more than 5 minutes. The video below shows how to properly change mowing heads and wheels on lawn mowers.

Advantages of discs over fishing line

The indisputable positive advantages of discs, in comparison with cord, include:

• Working with a variety of vegetation - it can be small grass, thick-stemmed plants, or long dead wood. The fishing line, in turn, has difficulty coping with even medium-sized plants, not to mention plants with thick stems. The cord will either quickly become tangled when trying to work on such grasses, or will wear out extremely quickly, which indicates a clearly low economic efficiency.
• The speed of achieving the desired result - the disc is quite capable of efficiently cutting the grass surface in one pass, without leaving the so-called “roosters”. The same cannot be said about mowing with a cord, especially since using a circle purely physically speeds up the entire mowing process.
• High wear resistance of the cutting wheel - yes, knives or parts of the wheel may become dull, but they can always be sharpened again. But if the fishing line breaks, then there is no way to fasten it - there will be only one option - a complete replacement.

However, it is worth mentioning the disadvantages that are inherent in the cutting wheel:

• It often causes the motor to overheat.
• When colliding with a very hard obstacle, there is a high probability of complete damage to the cutting edges, which cannot be repaired.
• It is more common for gears to break down, even though the drive that matches the drive is used, whether on a flexible shaft or a rigid one.

What applications are paddle blades for trimmers suitable for?

Compared to toothed or milling discs, paddle discs are lightweight, so they are used on low-power trimmers. Bosch equips its electric lawn mowers with exactly these types of cutting blades. Their advantage is the minimum moment of inertia, which eliminates the negative impact on the drive mechanism.

The number of blades affects the chopping of grass. The fewer blades, the more the grass being cut is crushed. For mowing homogeneous and similar grass, two-bladed discs are used. Their advantage is that they throw the cut shoots aside. To cut grass in the field when making hay, it is recommended to use 4 or more blade attachments. They do not crush the grass being cut, and do not load the drive mechanism of the tool.

This is interesting!
When choosing disks, special attention should be paid to the thickness of the blades. Manufacturers produce forged and stamped nozzles. Stamped ones are cheaper, and as a rule, when they hit stones or come into contact with other obstacles, they break off. It is recommended to choose exclusively forged wheels, which differ from stamped ones in the absence of characteristic areas of chips and cuts.

Basic rules for safe handling of metal trimmer blades

1. Such knives should only be installed on devices with a straight shaft. This circumstance is due to the design features of the cutting element.
2. If the disc hits a very hard obstacle during mowing (for example, a stone), it will usually bounce back towards the operator’s feet. For units with a straight rod, the distance to a person’s feet from the rotating head is quite safe.
3. Standard trimmers have U or J shaped handles for safe operation. If the design uses a D-shaped handle, then the unit is equipped with a special restrictive plug, which rests against the operator’s foot and ensures that the foot does not come into contact with the cutting parts.
4. Even if the cutting wheel has encountered a solid obstacle, causing it to bend, it is possible to correct this situation with the help of a simple hammer. To do this, you just need to straighten out all the irregularities with a few blows. However, this circumstance applies only to expensive brand models whose wheels are made of high-quality metal. Even the flexibility of the knives was specially incorporated into the design of the device by the manufacturer in order to reduce the load on the transmission and engine when colliding with hard objects.

Proper sharpening of trimmer discs

Long-term use of cutting discs may cause them to become dull. This phenomenon is considered normal, but it is not worth continuing to use such a circle - there is a possibility of causing injury to others and the final breakdown of the device itself. In addition, dull knives have reduced performance, which leads to poor mowing results, and it is also possible for the motors to overheat, which can lead to complete wear of the gearbox. The easiest way to sharpen knives is to sharpen them, and even buying new knives does not look economically justified against this background.

IMPORTANT! Any steel knife can be sharpened, including those equipped with Pobedit coatings. However, to sharpen them you will need a special diamond-coated wheel.

Step-by-step instruction:

1. First of all, the cutting part is removed, because sharpening the disc directly on the unit itself is not safe.
2. The disk must be inspected for continued operational suitability. You should not sharpen the cutting part if it shows signs of extreme deformation, cracks or chips - in this case it is better to replace the element.
3. The sharpening itself can be done using a regular file or grinder. It is also worth trying a sharpener, but in this case certain skills will be required from the operator. However, experienced gardeners prefer the simplest and safest method - using a file. To do this, you just need to secure the disk in a vice and turn it at an angle of 30 degrees.
4. In the case when coarse emery or grinder is used, this method will require special care. During sharpening, reddening and heating of the metal should not be allowed, otherwise it may become tempered. And this will further serve as the basis for accelerated wear and rapid abrasion of the cutting edge.
5. The ideal option for an inexperienced operator would be to use a file. With its help, you can sharpen the cutting element as efficiently as possible, without at all reducing its future performance.
6. Sharpening a wheel with numerous teeth (30-80 pieces) may present some difficulty - in this situation, you should use a grinder with a thin abrasive wheel.

At the end of all operations, you need to install the disk in the trimmer and check the mowing efficiency. This will take literally 5 minutes. It is necessary to pay attention to ensure that the unit does not overheat and that the mowed grass does not remain on the cutting parts.

Plastic circles for trimmer - when to use

While gasoline trimmers use metal milling and blade discs, it is recommended to use plastic discs for power tools. Their main advantage is their low weight, so the load on the electric motor is completely eliminated. Structurally, the nozzle is a plastic base on which knives are attached around the perimeter. Knives are made of soft plastic, which, when in contact with an obstacle, bends without deforming. The knives are mounted on a round base at an angle of 120 degrees.

They are designed for cutting thick grass with electric trimmers when the fishing line cannot cope. If the nozzle has a high moment of inertia, then it can be reduced by making symmetrical holes. When teeth become dull, they should be sharpened at a 30-degree angle using a low to medium grinding wheel.

Rating of the best knives and discs for trimmers for 2022

Economy class

3rd place: SIAT Blade 10002

A good example from Italy, characterized by simplicity and efficiency. The thickness of the blade approaches average values, which indicates that the tool is intended for everyday use. The product can be integrated with most modern models of brush cutters. No special care is required, engine overheating is not observed.

SIAT Blade 10002

Advantages:

• Good price/quality ratio;
• Solid base;
• Democratic price tag.

Flaws:

• Small number of blades.

2nd place: PATRIOT “Promo” TBS-3

Excellent replacement cutting element, compatible with all standard models. It will cope with both tough weeds and will perfectly mow the grass in small areas in hard-to-reach places. The body of the sample consists of hard plastics, which means increased wear resistance. It can be a reliable replacement for even expensive fishing line.

PATRIOT "Promo" TBS-3

Advantages:

• Increased strength;
• Versatility;
• A good alternative to cord.

Flaws:

• Weak distribution in the Russian Federation.

1st place: Huter Blade 3T-GDT

The blade disc is designed for processing small garden plots on an ongoing basis. The tool itself has a protective coating, which prevents premature wear and corrosion. Perfect for sharpening at home. The mass of the element does not overload the engine.

Huter Blade 3T-GDT

Advantages:

• Possibility of re-sharpening;
• Can be used on an ongoing basis.

Flaws:

• Not suitable for low power trimmers.

Middle segment

3rd place: AL-KO 112405

The sample has a standard fit diameter, which means it can be installed in various types of mowers. The manufacturer made the cutting blade from high-quality tool steel and, in addition, equipped it with anti-corrosion protection. Additionally, the possibility of re-sharpening is provided. It copes well with daily stress and is not afraid of collisions with hard objects.

AL-KO 112405

Advantages:

• Able to withstand permanent loads;
• Withstands collisions with rocks;
• Has additional protective coatings.

Flaws:

• Not detected (for its segment).

2nd place: ENIFIELD 40T-EN

Suitable for cleaning both dead wood and young growth. It does not leave “roosters”, the haircut is carried out extremely quickly and evenly. The form is based on stainless steel, which indicates high anti-corrosion qualities (working in conditions of morning dew). Has 40 cutting teeth, which maintains high productivity.

ENIFIELD 40T-EN

Advantages:

• Smooth haircut;
• Stainless steel is used;
• Variability of working material.

Flaws:

• A large number of teeth - it is better to entrust re-sharpening to a professional.

1st place: Fubag Four Blade 38740

A non-standard 4-bladed knife, rarely found in the Russian Federation. It shows itself quite well in working with dense vegetation, the stems do not wrap around the petals, and after cutting, an even and neat cover remains. The blades can be re-sharpened, however, they do not interact well with hard objects.

Fubag Four Blade 38740

Advantages:

• Re-sharpening;
• Reasonable price;
• Rare 4-blade design of the cutting wheel.

Flaws:

• The disc may become deformed when colliding with a solid object.

Professional samples

2nd place: CHAMPION C5157 HT48 “Maxi-Cut”

A great solution for avid gardeners. The model contains three movable knives made of heavy-duty plastic, which work perfectly on wet grass and weeds. Despite its high strength, the sample does not have an excessive mass, which has a beneficial effect on engine operation. Easy to maintain and dismantle.

CHAMPION C5157 HT48 “Maxi-Cut”

Advantages:

• Versatility;
• Strength;
• Light weight.

Flaws:

• Not detected.

1st place: Husqvarna 5784445-01

A powerful model designed for powerful trimming units. It is advisable to use it in branded devices that have a liquid fuel power source. It features high quality sharpening and a long service life.

Husqvarna 5784445-01

Advantages:

• Ease of use;
• Western quality;
• Long service life.

Flaws:

• Not found.

Types and area of ​​application of knives

Today we sell models that differ in:

• Knife material. There are not only metal, but also plastic knives. What to choose from this, everyone decides based on the power of the device. For example, it is important to remember that metal blades are heavier, so the trimmer shaft will be slower to gain speed, and this will affect the durability of the motor itself. But unlike plastic knives, steel knives cope with the assigned tasks more effectively.
• The second difference is the cutting edges. Today, products are sold that are diverse. This is how products with 4 teeth are sold, which are located at the same height or at different ones. In this case, the holes can be solid or technological.
• The last difference is in the shape of the knife itself. So the product can have the shape of a disk with 40 teeth, which is a convenient solution in some cases, but models in the form of several blades, such as 3-4, are also sold.

The choice of dimensions and design of the knife depends on the type of grass being cut; we also must not forget about the power and type of bar. Because it affects the final result.

If a person has a trimmer whose shaft is shaped like the letter J, then the use of steel knives is not recommended, since if the product comes into contact with a stone or similar solid substance, the product will be thrown towards the user. All this will lead to the fact that a person may have a leg injury, and the wound can become very serious.

We must not forget that the inertia of perforated knives is several times lower than that of standard versions. Of course, this is minimally reflected on the instrument itself, especially if high-quality steel was used in its manufacture. But if you buy a cheap Chinese version, you shouldn’t count on good metal.

In some cases, plastic trimmer blades are suitable for a person. Yes, they are not durable and deteriorate quickly, but thanks to them the user will be able to cut off most types of vegetation. Also, due to the elasticity of the product, no additional loads are created on the engine.

Instead of an epilogue

To summarize, it is worth noting that the quality of grass cutting will directly depend on the competent and correct selection of a knife/disc for the trimmer. If your budget allows, then it is better not to skimp on the model of the brush cutter itself and take a universal model that can work with both fishing line and discs. At the same time, it is preferable to purchase both cord and discs in several versions at once in order to correctly use the cutting element depending on the work that needs to be done. But the power source (electric motor, battery, liquid fuel) must be selected based on the tasks that will need to be performed most often.

When to use a trimmer disc instead of a fishing line

The difference between a metal disc and a trimmer fishing line is already clear. When is it necessary to finish mowing with a fishing line and attach a metal circle to the trimmer? This question is popular among beginners, since if you continue to mow large, thick grass with a cord, it will quickly wear out. This is due to the fact that the fishing line begins to break at high speed on thick-stemmed grass, which leads to its damage and, accordingly, rapid wear.

You should use knives on the trimmer when mowing the following vegetation:

• Tall and rough grass cover
• Weeds and dead wood
• Young shoots of trees up to 7 cm in diameter
• Domestic thick-stemmed plants such as raspberries, rosehips, currants

The use of knives eliminates rapid wear of the fishing line, and also increases the efficiency and productivity of the lawn-mowing tool.

This is interesting!
Manufacturers produce metal disks with an outer diameter from 220 to 255 mm.