[Convenient Cutting Removal] - Our product includes 2 replacement grass trimmer spools, 9m long, 1.6mm diameter, a cap pack and a spring. The spool can be inserted and removed without tools and will not damage the device. It is an indispensable replacement for any lawn mower! [Heavy Duty Nylon Material] - Our line spool lawn mower is made of durable polyamide nylon, offers good flexibility and long service life. The grass trimmer cutting line with a diameter of 1.6mm can reduce resistance and enable fast cutting. [Automatic Feeding System] - The grass trimmer cutting line replacement spool for automatic feeding system eliminates the tedious work of manually winding spools and makes it easier. To a certain extent, it reduces the workload, which helps to improve work efficiency and makes mowing easier! [Easy to Replace] - You only need to pass the trimmer line through the through hole and press the trimmer line to run down. Insert the spring on the spool cap into the bottom slot of the