Depressed Center Cut-Off Wheel Abrasive Material Zirconia Alumina Connector Size 5/8 in-11 Connector Type Threaded Hole Grit 36 Overall Diameter 4 1/2 in Overall Thickness 0.09 in Primary Material Applicationn Stainless Steel Steel Compatible Tool Type Angle Grinder Series Z-Tech Wheel Type Type 27 Maximum Operating Speed 13 300 RPM Grade Extra Coarse