Tube Brush, Operation Type - Spiral and Tube Brush Power, Double Spiral Brush, Shank Style - Abrasive Brushes Double, Brush Dia. 0.5 in, Brush Length 2 in, Overall Length 5 in, Wire Dia. 0.004 in, Shank Size 0.156 in, Fill Material Steel, Max. RPM 2,000 RPM