Diablo Steel Demon 12 In. Metal High Speed Cut Off Disc 1 in. Arbor. Diablo's Steel Demon Metal Cut Off Discs Deliver Industrial Performance, Increased Productivity And Longer Cutting Life. Featuring A Premium Ceramic Blend That Produces Quick Cuts That Deliver Up To 6X Longer Life. Fully Reinforced For Hand-Held Work, These Discs Are Ideal For Cuts And Working In Hard-To-Reach Areas.