The X431 Standard for metal delivers excellent finishing results when roughing edges and weld seams, as well as on coarsely ground metal surfaces. Its abrasive surface made from high-quality zirconium oxide-reinforced semi-precious corundum grain is robust, wear-resistant, and ensures a uniform surface finish. The sturdy backing material, X-fabric, provides work stability for clean and consistent results. The full synthetic resin bonding of the abrasive grains ensures wear resistance under heavy use. The backing plate is available in both angled and straight designs, and can be made from either fiberglass or plastic.