Diablo's 4-1/2" premium metal cut-off discs provide superior performance and increased productivity. Featuring a premium aluminum oxide blend, these discs cut through material faster than other cut-off discs and offer an extra long cutting life. Fully reinforced for use in hand-held cut-off work. Ideal for use when working in hard to reach areas. Premium Aluminum Oxide Blend - a superior quality formulation designed for fast material removal and long cutting life. Common metal applications: steel, stainless, cast iron, and sheet metal.