Diablo's 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. Diablo's thin kerf design provides for a thin, fast cut with minimal burr formation. Unlike other bonded discs on the market, this cut-off disc is a true .4 in. design. Fully reinforced for use in hand-held cut-off work. Ideal for use when working in hard to reach areas.