For use with quick-changing hook-and-loop backing pads. Fits vented sanders with 5-hole dust collection pattern pad. Made with durable aluminum oxide abrasive. Anti-clog stearate lubricant resists sand dust build-up. Resin coated to resist heat and humidity. For use on wood, metal, drywall, fiberglass, or painted surfaces. Diameter: 5 In. Grit: 220 Grit Abrasive Material: Aluminum Oxide Backing Type: Hook & Loop