Cup Brush Product Type Cup Brush Quick Change System Not Applicable Bristle Type Crimped Wire Bristle Material Brass Brush Dia 2 3/4 in Wire Dia 0.012 in Bristle Length 7/8 in Grit Not Applicable Overall Length 3 in Compatible Tool Type Straight Grinder Color Silver Primary Material Application Brass Connector Type Shank Connector Size 1/4 in Operating Speed - Maximum 6 000 RPM Shank Length 1/4 in