Diablo, 4.5″ x 1/2″ x 7/8″, premium dual metal cutting & grinding discs, provides superior performance & increased productivity, premium aluminum oxide blend, cut & grind through material faster than other discs & extra long life, all-in-one disc allows you to cut & grind simultaneously, fully reinforced for use in hand held cut-off work, ideal for use when working in hard to reach areas.