Wire Wheel Brush, Bristle Type Crimped Wire, Product Type Wire Wheel Brush, Bristle Material Carbon Steel, Brush Dia. 3/4 in, Grit Not Applicable, Face Width 3/16 in, Bristle Diameter 0.005 in, Bristle Length 3/16 in, Compatible Tool Type Die Grinder, Pencil Grinder, Connector Type Round Shank, Connector Size 1/8 in, Operating Speed - Maximum 37,000 RPM, Color Not Applicable This wire wheel brush features carbon steel abrasive material.