Cup Brush Product Type Cup Brush Quick Change System Not Applicable Bristle Type Crimped Wire Bristle Material Abrasive Nylon Brush Dia 2 3/4 in Wire Dia 0.035 in Bristle Length 1 1/4 in Grit 180 Overall Length 3 1/8 in Compatible Tool Type Die Grinder Color Silver Primary Material Application Carbon Steel Connector Type Shank Connector Size 1/4 in Operating Speed - Maximum 6 000 RPM Shank Length 1/4 in