Unitized Wheel Abrasive Material Aluminum Oxide Density Rating Soft (2) Grade Medium Series Bear-Tex Rapid Blend NEX Face Width 1/2 in Maximum Operating Speed 12 100 RPM Overall Diameter 3 in Connector Size 1/4 in Connector Type Unthreaded Hole Quick Change System Not Applicable Abrasive Type Non-Woven Color Brown Resistance Properties Smear Package Quantity 20