Gator 5" 8 Hole Extra Coarse 40 Grit Hook & Loop Sanding Disc, suitable for 8-Hole Skil, Bosch, B & D, DeWalt. Made of aluminum oxide with a resin bond, this sanding disc is ideal for use on drywall, fiberglass, metal, and wood. It provides 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.