Unitized Wheel Abrasive Material Aluminum Oxide Density Rating Hard (8) Grade Medium Series Bear-Tex Rapid Blend NEX Face Width 1/2 in Maximum Operating Speed 22 000 RPM Overall Diameter 2 in Connector Size 1/4 in Connector Type Unthreaded Hole Quick Change System Not Applicable Abrasive Type Non-Woven Color Brown Resistance Properties Smear Package Quantity 30