The 20Pcs Replacement Spool Line 2 Spool Cap Cover is designed for Worx String Trimmers, providing a convenient solution for replacing worn-out spools and caps. The package includes 16 spools and 4 caps, offering ample replacements for continuous use. The spools are compatible with Worx brand trimmers and come in a size suitable for efficient trimming tasks. This product is a practical choice for maintaining the performance of Worx String Trimmers in yard and garden maintenance. This Replacement Grass Trimmer Line Spool Set Is Designed For Worx Weed Eater. With The Auto Feed System, The Replacement Spool Eases The Tedious Work Of Hand-Winding Spools. The Spool Compatible With Worx Utilizes Centrifugal Force To Feed The Trimmer Line As It Is Needed. High-Quality 10ft/ 3.1m Weed Eater Edger Line String Easily Cuts Through Grass And Weeds. Strong Toughness, Not Easy To Break, Necessary For Garden Mowing. Always Wear Eye Protection. Unplug Tool Before Changing, Installing, Or Removing Accessories. Choking Hazard, Small Parts Keep Away Children Under 3 Years. Only Suitable For Tender Weed Grass. Tough And Strong Weeds Please Use Blades To Trim. Does Not Fit Any Other Brand Of String Trimmers.