The round trimmer line is a standard basic shape and will not wear out as quickly as other trimmer lines. These trimmer lines are used for light residential use where weeds are minimal. The round trimmer line has fewer breaks, and is more durable for concrete, trees, etc., and extends the use time. This is also the easiest trimmer line to change in your string trimmer.
The multilateral trimmer line is specially designed for landscaping professionals. It is more suitable for commercial work that requires a lot of cutting of heavier weeds or larger lawns, and can obtain a cleaner cutting effect. These lines are usually stars, squares or pentagons.
Spiral trimmer lines are best used in commercial areas where noise is limited. It increased the intensity, reduced the vibration of the trimmer, increased the efficiency and reduced the noise level. Provides durability when hitting concrete or hard surfaces, suitable for heavy work.
The edge of the serrated line is like a tooth or a kitchen knife. It can quickly saw blades of grass and thick leaves, and cut weeds easily and quickly, thereby cutting weeds to a greater extent and shortening the cutting time to a greater extent. For moderate-intensity work.