Cut-Off Grinding Wheel Abrasive Material Zirconia Alumina Connector Size 7/8 in Connector Type Unthreaded Hole Grit 24 Overall Diameter 4 1/2 in Overall Thickness 0.125 in Primary Material Applicationn Steel Compatible Tool Type Angle Grinder Series Carbo Premier Red Wheel Type Type 27 Maximum Operating Speed 13 580 RPM Color Red Grade T