Unitized Wheel, Abrasive Material Silicon Carbide, Density Rating Soft (2), Grade Fine, Series XL-UW, Face Width 1/4 in, Maximum Operating Speed 4,000 RPM, Overall Diameter 8 in, Connector Size 1/2 in, Connector Type Unthreaded Hole, Quick Change System Not Applicable, Abrasive Type Non-Woven, Color Gray, Resistance Properties Load, Smear