Norton , 3 pack, 5", 40 grit, 8 hole, premium hook & loop, ceramic sanding discs, for use on 5" random orbit sanders, for use on wood, metal, fiberglass & painted surfaces, premium ceramic grains sands cooler, cuts faster & lasts longer, up to 5 times longer than traditional sanding discs, anti-clog stearate coating reduces particle build up, keeping the high performance grain exposed longer.