The MAKERX 5-piece 80G flap sanding wheels work with the MAKERX Angle Grinder (WX741L.9). The sanding wheels are also compatible with any 2-inch angle grinder with a 3/8 inch arbor. The 80g flap sanding wheel is best used for paint prepping on wood and metal surfaces. You can also use the wheels for sanding small areas. This set includes 5 sanding wheels.