Unitized Wheel Abrasive Material Silicon Carbide Density Rating Soft (2) Grade Fine Series Bear-Tex Rapid Blend NEX Face Width 1/4 in Maximum Operating Speed 12 000 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 Resistance Properties Smear