Tiger Zirc, 58023, Depressed Center Cutting Wheel, Fast Cut and Long Life Performance Line Thin, 7 in Wheel Diameter, 0.06 in Wheel, 7/8 in Center Hole, Arbor Connector, 60 Grit, Medium Grade, Zirconia Alumina Abrasive, Wheel Type Number: Type 27, 8500 rpm Maximum, Resin Bond, Applicable Materials: Carbon Steel, Structural Steel, Cast Iron, Steel, Stainless Steel and Metals, Wheel Hardness: T, Reinforced: Yes, Specifications Met: ANSI B7.1-2010