Gator 5-Pack 5" 5 Hole 120 Grit Aluminum Oxide Red Resin Sanding Discs are designed specifically for power tools. They can be used on wood, metal, drywall, fiberglass, and painted surfaces. The quick change hook and loop holding system allows for faster disc changes. The discs are resin bonded to resist heat and humidity for longer life. The vented hole pattern matches the sander's pad for maximum dust extraction. These discs are suitable for 5-hole Porter Cable random orbit sanders. Gator 5 inch Random orbit sanding discs provide great finishing results and good value. These red resin discs are specifically designed for power tool use as they resist heat build-up and humidity for longer life.