End Brush Product Type End Brush Quick Change System Not Applicable Bristle Type Crimped Wire Bristle Material Brass Brush Dia 3/4 in Wire Dia 0.014 in Bristle Length 7/8 in Grit Not Applicable Overall Length 2 1/4 in Compatible Tool Type Straight Grinder Drill Press Pencil Grinder Color Not Applicable Connector Type Shank Connector Size 1/4 in Operating Speed - Maximum 20 000 RPM