25 pack of DIABLO METAL CUT-OFF 4 1/2 THICKNESS .040. 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. Fully reinforced for use in hand-held cut-off work. Ideal for use when working in hard to reach areas.