Diablo premium masonry cut-off discs provide superior performance and increased productivity. Featuring a premium silicon carbide 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. Silicone Carbide Blend, a superior quality formulation designed for fast material removal and long cutting life For use on masonry applications: concrete brick, cinder block, cement, paver stones Type 27 depressed center Tool use angle grinder