Gator 50-Pack 5" 8 Hole Extra Fine 220 Grit Hook & Loop Sanding Discs are made with aluminum oxide abrasive and have a resin bond. They are suitable for use on drywall, fiberglass, metal, and wood. They are also suitable for use with 8-hole Skil, Bosch, B & D, DeWalt. Gator 5 inch Random orbit sanding discs provide great finishing results and good value. These red resin discs are specifically designed for power tool use as they resist heat build-up and humidity for longer life.