Double Spiral Tube Brush, Product Type Double Spiral Tube Brush, Stem Style Double, Brush Material Steel, Brush Dia. 7/8 in, Compatible Tube Outer Diameter Not Applicable, Stem Diameter 1/4 in, Brush Length 2 1/2 in, Wire Dia. 0.01 in, Overall Length 5 1/2 in, Compatible Tool Type Drill, Operating Speed - Maximum 2,000 RPM