SAIT 63383 SAIT-Saver, Economy Aluminum oxide, closed coat, X-weight cotton. For low cost sanding and finishing of ordinary and alloyed steel, ferrous and non-ferrous metal, cast iron, and wood. A good choice where price and best value us the determining factor. United Abrasives is a world leader in manufacturing a broad range of grinding wheel, cutting wheel, coated abrasive, carbide bur, wire brushes, specialty products and much more.