Cup Brush Product Type Cup Brush Quick Change System Not Applicable Bristle Type Crimped Wire Bristle Material Carbon Steel Brush Dia 3 in Wire Dia 0.014 in Bristle Length 1 in Grit Not Applicable Overall Length 3 1/16 in Compatible Tool Type Right-Angle Grinder Color Silver Primary Material Application Carbon Steel Connector Type Threaded Hole Connector Size 1/2 in-13 Operating Speed - Maximum 14 000 RPM Shank Length Not Applicable