Gator 5-Pack 5" 5 Hole 220 Grit Aluminum Oxide Red Resin Sanding Discs are designed for power tools and can be used on wood, metal, drywall, fiberglass, and painted surfaces. They feature a quick change hook and loop holding system for faster disc changes and fit Porter Cable random orbit sanders. The resin bonded discs resist heat and humidity for longer life and the vented hole pattern matches the sander's pad for maximum dust extraction.