7100045947-A Unitized Wheel, Abrasive Material Silicon Carbide, Density Rating Hard (7), Grade Extra Coarse, Face Width 1 in, Maximum Operating Speed 10,000 RPM, Overall Diameter 4 in, Connector Size 1/2 in, Connector Type Unthreaded Hole, Quick Change System Not Applicable, Abrasive Type Non-Woven, Color Gray, Grit Extra Coarse, Resistance Properties Heat, Load