Norton portable sanding belts for high speed sanding and finishing of flat surfaces on wood, plastic, and fiberglass, grinding and finishing of all metals, blending welds and abrasive planing of wood. General purpose aluminum oxide abrasive grain is tough and durable, with an aggressive cutting action. X-weight cotton backing makes these belts ideal for metal, wood, plastic and fiberglass. Bi-directional belt splice. No directional arrows to look for. Simply put the belt on the machine and go. Open coat to reduce clogging for longer useful life when sanding soft woods and other similar materials. Job specific application guide on packaging simplifies selection. Extra Coarse for extra heavy sanding or abrasive planing.