WA0010 3m trimmer spool, compatible with original WA0010 spool models and WA6531 GT models. Compatible brush cutter models: WG163, WG163.4, WG163.9, WG160, WG160.4, WG160.3, WG160.1, WG160.2, WG165, WG154, WG155, WG150, WG150.1, WG1. 55.5, WG152, WG153.5, WG156, WG157, WG170, WG175, WG180, WG954, WG921 Replacement thread spools are made of high quality raw materials, ABS thread is quite sturdy, flexible nylon wire and strong enough for long service life. Quick and effortless tool-free replacement thanks to a locking system. Professional CNC cutting and automatic winding are safer and faster than manual spools, reduce damage and will not jam when mowing.< /p> Wear safety glasses and long underpants when using this product to avoid injury in case of line overflow. Unplug the power cord before replacing, installing or removing accessories.