FlexOvit Razorblade HD Cut-Off Wheel, Heavy Duty, Series: Razorblade HD, 4-1/2 in Wheel Dia, 3/32 in Wheel Thickness, 7/8 in Center Hole, 36 Grit, Medium Grade, Aluminum Oxide Abrasive, 13300 rpm Maximum, Resin Bond, Applicable Materials: Ferrous Metals and Profiles Including Angle Iron, Bar Stock, Channel Iron, I-Beam, High Tensile Steel, Iron Pipe, Steel, Stainless Steel, Rebar, Tubing and Welds, Wheel Type Number: Type 1, Wheel Hardness: TB, For Use With: Angle Grinders, Yes Reinforced, ANSI B7.1 Specifications Met