Segment Cup Grinding Wheel, Abrasive Material Diamond, Connector Size 5/8 in; 7/8 in, Connector Type Unthreaded Hole, Compatible Tool Type Angle Grinder, Primary Material Applicationn Concrete, Number of Segments 12, Overall Diameter 4 in, Segment Design Single Row, Maximum Operating Speed 15,000 RPM, Series Vari-Grind, Abrasive Depth 3/16 in