Featuring highly concentrated, high-performance aluminum oxide grain for quick cuts and long life, Dewalt Type 1 metal cutting chop saw wheels are ideal for all ferrous metal, including steel, bar stock, tubing, and studs. 2 full sheets of fiberglass deliver durability and safety. An exclusive material mix ensures long wheel life. Premium silicon carbide grain for long life and fast cuttingProprietary material mix ensures durable long life wheelsDiamond knockout arbor for use with worm drive saws