Diablo, 4-1/2", Diamond, Metal, Cut-Off Wheel, Deliver Extreme Durability, Minimal Downtime & Increased Productivity, Diamond Rimmed Wheels Deliver 100x Longer Cutting Life Versus Standard Bonded Cut-Off Disc In Some Of The Most Intense Metal Cutting Situations, Long Lasting Durability Maximizes Cutting Even In Extreme Applications Such As Rebar, Angle Iron, Cast Iron & Steel Bar, Provides Long Lasting Cutting Life, Durability & Control, Allow For Safer Cutting Experience.