Coated abrasives are often referred to as "sandpaper" although they are not made with sand and most often are not backed with paper. Coated abrasives are formed by gluing natural and synthetic abrasive grains. Abrasive grains include aluminum oxide, silicon carbide, zirconia alumina, garnet and emery. Backing materials include paper, cloth, fibre and polyester film. The coated abrasives are manufactured in "jumbo" rolls then cut into different shapes such as belts, discs, rolls and sheets for surface-treatment and polishing applications in markets such as the furniture, lumber, cabinet, boat, automotive, welding, foundry, jewelry, and do-it-yourself markets. Saint-Gobain Abrasives is one of the world's leading coated abrasives manufacturers.