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 Compatible Tool Type Straight Grinder Drill Press Pencil Grinder Color Not Applicable Connector Type Shank Connector Size 1/4 in Operating Speed - Maximum 8 500 RPM Shank Length 1/4 in