Gator 5-Pack 5" 5 Hole 80 Grit Aluminum Oxide Red Resin Sanding Discs are designed specifically for power tools. They are suitable for use on wood, metal, drywall, fiberglass and painted surfaces. The quick change hook & loop holding system allows faster disc changes. They fit Porter Cable random orbit sanders. The resin bonded to resist heat & humidity for longer life. The vented hole pattern matches sanders pad for maximum dust extraction. Gator 5 inch Random orbit sanding discs provide great finishing results and good value.