End Brush Product Type End Brush Quick Change System Not Applicable Bristle Type Standard Twist Knot Wire Bristle Material Bronze Brush Dia 1 in Wire Dia 0.014 in Bristle Length 1 in Grit Not Applicable Overall Length 3 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