Diablo, 4″ x 0.040″ x 5/8″, premium metal cut-off discs, provides superior performance & increased productivity, premium aluminum oxide blend, cut through material faster than other cut-off discs & extra long cutting life, thin kerf design provides for thin, fast cut with minimal burr formation, fully reinforced for use in hand held cut-off work, ideal for use when working in hard to reach areas.