Double Spiral Tube Brush, Product Type Double Spiral Tube Brush, Stem Style Double, Brush Material Brass, Brush Dia. 1/2 in, Compatible Tube Outer Diameter Not Applicable, Stem Diameter 5/32 in, Brush Length 2 in, Wire Dia. 0.004 in, Overall Length 5 in, Compatible Tool Type Drill, Operating Speed - Maximum 2,000 RPM