Tiger Depressed Center Cutting Wheel, Fast Cut and Long Life Performance Line Thin, 4-1/2 in Wheel Dia, 0.045 in Wheel Thickness, 7/8 in Center Hole, Arbor Connector, 60 Grit, Medium Grade, Zirconia Alumina Abrasive, Wheel Type Number: Type 27, 13300 rpm Maximum, Resin Bond, Applicable Materials: Carbon Steel, Structural Steel, Cast Iron, Steel, Stainless Steel and Metals, Wheel Hardness: T, Yes Reinforced, ANSI B7.1-2010 Specifications Met.Weiler’s diverse line of cutting wheels provide a consistent, well balanced, high quality solution. From our thin cutting wheels that slice through metal, to our large diameter wheels for the biggest cuts, professionals get the most demanding jobs done right and done fast.