Gator Finishing 3013 40 Grit Aluminum Oxide Sanding Discs (3 pack), 6" The pressure sensitive Stick-On holding system holds securely without slipping, tearing, or wrinkling For use on wood, metal, drywall, fiberglass, and painted surfaces Resin-bonded to resist heat and humidity for longer life The anti-clog stearate coating reduces particle build-up, keeping the high performance grain exposed longer