Features: High quality Lightweight and waterproof, the trimming blade is made of high-quality plastic material, which is not easy to break or deform, and is not affected by high temperature weather. Gear design The edge of the trimming blade is designed with gears, which saves effort and improves mowing efficiency. Compatible with most lawn mower sizes, compact and lightweight, easy to carry. Easy to install Thread the screw through the hole in the middle and attach the blade to the mower with a screwdriver, changing trimmer blades is super easy! There is a small hole in the middle for easy installation. Save your time and increase your productivity! Specification: Material: plastic .