Gator, 5 pack, 5", 5 hole, 80 grit, aluminum oxide, red resin, sanding discs, designed specifically for power tools, for use on wood, metal, drywall, fiberglass & painted surfaces, quick change hook & loop holding system allows faster disc changes, fits porter cable random orbit sanders, resin bonded to resist heat & humidity for longer life, vented hole pattern matches sanders pad for maximum dust extraction.