Grass Trimmers are useful power tools that clear grass and weeds from the garden. The cutting lines in your grass trimmer gradually wear down as a result of repeated contact with grass, weeds and hard objects, such as pavement, stones and trees. This Spool & Line is situated at the bottom of your trimmer and is responsible for the trimming action. It spins at a high rate of speed and cuts down any unwanted grass. Over time the line can split or break, making this replacement essential. Replace a broken or worn line to help your trimmer deliver a reliably efficient cutting action. Please check model fit list to ensure this part is correct for your model.