Cup Brush, Product Type Cup Brush, Quick Change System Not Applicable, Bristle Type Crimped Wire, Bristle Material Carbon Steel, Brush Dia. 3 in, Wire Dia. 0.014 in, Bristle Length 1 in, Grit Not Applicable, Overall Length 2 7/8 in, Compatible Tool Type Right-Angle Grinder, Color Silver, Primary Material Application Carbon Steel, Connector Type Threaded Hole, Connector Size 3/8 In.-24, Operating Speed - Maximum 14,000 RPM, Shank Length Not Applicable