Sandpaper has a stiff paper or fabric backing material covered with an abrasive substance such as aluminum oxide, silicon carbide, diamond, garnet, or emery. It removes small amounts of material to debur, polish, buff, and finish wood, metal, fiberglass, drywall, and plastic surfaces. Sandpaper sheet kits offer multiple sheets with abrasive grades ranging from coarse for removing material, to fine for buffing and polishing. Industrial sandpaper rolls are suitable for larger projects or shop environments, allowing workers to tear off the amount of sandpaper they need. Sandpaper sheets are pre-cut.