The Worx Spool Cap Cover for Worx Cordless String Trimmers is tough, durable, easy to install, and keeps your Worx string trimmer ready to take on your lawn and keep it looking sharp. Constructed of rugged High Impact ABS material, built to withstand the blows, pokes and jabs that come from regular and heavy-duty trimming. It snaps right into place without the need of additional tools. Just power down the trimmer (remove the batteries), flip it over, and pop it on. So you can quickly get back to the work of minding the details of your lawn. Precisely calibrated to keep your string trimmer line protected and securely in place, which contributes to the overall performance of your trimmer. Many of us need a replacement spool cover at least once over the lifetime of a string trimmer. This solid replacement cap is built to last, easy to snap into place, and ready to keep your Worx String Trimmer running smoothly. So you can keep your lawn looking neat and the envy of the neighbors for years to come. It’s compatible with select Worx String Trimmer models: WG122, WG150, WG151, WG152, WG153, WG154, WG155, WG156, WG157, WG160, WG163, WG165, WG170 WG175, WG180 Series.