METALMAX, 4.5" x 7/8", Diamond Edge Cut-Off Wheel, Advanced Diamond Technology Provides Durability In Metal Cutting Applications, Increased Productivity, Reduced Downtime, Made With Diamonds, Cutting Depth Stays The Same Throughout Its Life, Meaning Better Control, Reach & Precision, Less Odor & Dust Residue, Sparks Originate Only From The Material Being Cut, Recommended For Multiple Types Of Metal Including Steel, Sheet Metal, Stainless Steel, Rebar, Cast Iron, Non-Ferrous Metals & Aluminum, 30 Times Longer Life Than Thin Bonded Cut-Off Wheels, 1,000 Or More Cuts.