Unitized Wheel Abrasive Material Aluminum Oxide Density Rating Medium (5) Grade Fine Series Bear-Tex Rapid Blend Face Width 1/4 in Maximum Operating Speed 20 000 RPM Overall Diameter 2 in Connector Size 1/4 in Connector Type Unthreaded Hole Quick Change System Not Applicable Abrasive Type Non-Woven Color Gray Grit 220