End Brush Product Type End Brush Quick Change System Not Applicable Bristle Type Crimped Wire Bristle Material Carbon Steel Brush Dia 1/2 in Wire Dia 0.006 in Bristle Length 1 in Grit Not Applicable Overall Length 2 1/2 in Compatible Tool Type Straight Grinder Drill Press Pencil Grinder Color Not Applicable Primary Material Application Cast Iron Plastic Steel Wood Connector Type Shank Connector Size 1/4 in Operating Speed - Maximum 25 000 RPM