Gator 5-Inch 8-Hole Red Resin Multi-Surface Hook and Loop Sanding Discs, 220-Grit, 12 pack: These sanding discs are made with high-performance red resin which runs cooler and sands faster, making it perfect for power sanding. Changing discs is quick and easy thanks to the strong and secure hook and loop backing. These sanding discs are manufactured with the highest standards in the industry and are designed for heavy-duty sanding of multiple surfaces, including wood, metal, fiberglass, and plastic.