Cup Brush Product Type Cup Brush Quick Change System Not Applicable Bristle Type Crimped Wire Bristle Material Carbon Steel Brush Dia 1 3/4 in Wire Dia 0.012 in Bristle Length 3/4 in Grit Not Applicable Overall Length 1 7/8 in Compatible Tool Type CNC Machine Color Silver Primary Material Application Carbon Steel Connector Type Shank Connector Size 1/4 in Operating Speed - Maximum 13 000 RPM Shank Length 1/4 in