Material: Aluminum oxide Size: 6 inch Quantity: 300 pcs Grit:80 Product features: Superior quality sanding discs made with super-coated aluminum oxide. It delivers a fast, exceptionally long-lasting sharp cut with a consistent scratch pattern. The sticky adhesive backing enables the discs to be quickly and securely attached to a DA sander PSA backing plate. Wide application: Self-adhesive sandpaper is widely used for grinding wood, furniture, jewelry, jade, metal, walls, and lacquered surfaces. It can be competent for grinding, polishing, rust removal, deburring, and edge trimming.