Miniature Cup Brush Product Type Cup Brush Quick Change System Not Applicable Bristle Type Crimped Wire Bristle Material Brass Brush Dia 5/8 in Wire Dia 0.005 in Bristle Length 1/4 in Grit Not Applicable Overall Length 1/2 in Compatible Tool Type Die Grinder Color Silver Primary Material Application Brass Connector Type Shank Connector Size 1/8 in Operating Speed - Maximum 37 000 RPM Shank Length 1/8 in