Grinding Wheel, Abrasive Depth 1/8 in, Abrasive Material Diamond, Back Thickness 7/16 in, Concentration 50, Connector Size 1 1/4 in, Connector Type Unthreaded Hole, Grit 220, Compatible Tool Type Tool and Cutter Grinder, Primary Material Applicationn Ceramic, Composite, Glass, Natural Stone, Plastic, Overall Diameter 6 in, Overall Thickness 3/4 in, Rim Thickness 3/4 in, Series Not Applicable, Specification SD220-P50V99-1/8, Wheel Type Type 6, Maximum Operating Speed 4,140 RPM