Forney 1 In. Hex .008 In. Wire Brush is i for a variety of general uses including surface blending, cleaning, and polishing. This wire brush is suitable for use on CNC (Computer Numerical Control) equipment or with any 1/4" diameter electric or air tool, cordless drill, or 01990 pneumatic (air) drill. It features a 1-inch diameter, a 1/4" hex shank size, and a .008-inch coarse wire size, designed to deliver efficient performance with a maximum speed of 20,000 rpm. The brush comes packaged in a convenient clamshell for easy storage and handling. Model Number: 72737