Grinding Wheel Abrasive Depth 1/4 in Abrasive Material Diamond Concentration 100 Connector Size 3/4 in Connector Type Unthreaded Hole Grit 120 Compatible Tool Type Angle Grinder Primary Material Applicationn Ceramic Glass Overall Diameter 4 in Overall Thickness 1/16 in Specification SD120-R100B99-1/4 Wheel Type Type 1 Maximum Operating Speed 15 280 RPM Bond Type Resin Grade Standard