Stem mounted wire end brush. Bulk. Designed for easy access into narrow holes and confined areas. Twist knot for heavy duty. Removes rust, scale, paint, etc., in hard-to-reach places. Use with any 1/4" (6.35mm) diameter electric or air tool cordless drill or 01990 pneumatic (air) drill. Carded version is Forney 60002. Diameter: 3/4" Shank: 1/4" Wire Size: .020" (.508mm) RPM: 25,000