These Klingspor belts are an industrial quality, semi-open coat, aluminum oxide cloth backed belt. These belts can be used on any type of wood and light metal applications. Did you know all of these belts can run in EITHER direction? All the belts are joined with a “Butt Splice”, in which the belt ends are butted together and joined by high strength tape on the underside of the joint. This allows the belt to run in either direction for greater belt life.