SincereetaliFIT MODELS - For multiple Worx trimmer/edger models: WG150, WG151, WG151.5, WG152, WG153, WG154, WG155, WG155.5, WG156, WG157, WG160, WG160.1, WG160.2, WG160.3, WG162, WG163, WG165, WG166, WG166.1, WG167, WG174, WG175, WG175.1, WG176, WG180. Trimmer Spool Model: WA0010, Spool Cap Cover Model: WA0010. SPOOL SPECIFICATION - 3m spiral nylon copolymer resin and synthetic trimmer/cutting line for original Worx WA0010 spools. The portable cord with a diameter of 1.65mm provides fast cutting and a longer service life. DURABLE MATERIAL - High-quality auto trimmer spool and durable nylon copolymer line in a helical design, flexible and bendable as well as durable. Wacker's high-quality ABS weed cover is sturdy enough to hold the spool in place and keep it secure while mowing. CHEAP AND TIME-SAVING - Quick and effortless replacement without tools by snapping into place. Professional CNC cutting and automatic rewinding are safer and more time-saving than manual rewinding, reduce damage to the grass trimmer, and do not jam when mowing. PRECAUTIONS FOR USE - When using this product, wear safety glasses and long underpants to avoid injury from overflow. Remove the plug from the outlet before replacing, installing, or removing accessories. This cordless weed eater recharge is only suitable for young grass. Strong weeds use other tools such as blades for trimming.