Depressed Center Grinding Wheel Abrasive Material Ceramic Connector Size 7/8 in Connector Type Unthreaded Hole Grit 24 Overall Diameter 6 in Overall Thickness 0.25 in Primary Material Applicationn Nickel Alloy Stainless Steel Steel Compatible Tool Type Angle Grinder Series Elite Wheel Type Type 27 Maximum Operating Speed 10 100 RPM