Tube Brush, Product Type Single Spiral Tube Brush, Stem Style Double, Brush Material Nylon, Brush Dia. 3/4 in, Compatible Tube Outer Diameter Not Applicable, Stem Diameter 1/4 in, Brush Length 2 1/2 in, Wire Dia. 0.022 in, Overall Length 5 1/2 in, Compatible Tool Type Drill, Operating Speed - Maximum 2,000 RPM