Tube Brush, Operation Type - Spiral and Tube Brush Manual, Single Spiral Brush, Shank Style - Abrasive Brushes Single, Brush Dia. 0.5 in, Brush Length 3 in, Overall Length 8 1/2 in, Wire Dia. 0.01 in, Shank Size 0.125 in, Fill Material Nylon, Max. RPM 2,000 RPM