Cup Brush Product Type Cup Brush Quick Change System Not Applicable Bristle Type Crimped Wire Bristle Material Carbon Steel Brush Dia 2 1/4 in Wire Dia 0.014 in Bristle Length 5/8 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 4 500 RPM Shank Length 1/4 in Series Gemini