Unitized Wheel, Abrasive Material Silicon Carbide, Density Rating Soft (4), Grade Fine, Series Bear-Tex Rapid Blend, Face Width 3/4 in, Maximum Operating Speed 8,000 RPM, Overall Diameter 3 in, Connector Size 1/4 in, Connector Type Unthreaded Hole, Quick Change System Not Applicable, Abrasive Type Non-Woven, Color Gray, Package Quantity 20.