66482 Mill-Rose 1/4" X 2" I.D. Hex Shank Power Fitting Brush Mill-Rose hex-shank power fitting brushes feature high carbon or stainless steel bristles that provide long brush life. These brushes are ideal for quick cleaning of fittings, tubing, drill holes, as well as deburring soft steel, stainless steel, brass, copper, aluminum, plastic and other materials. Brushes have been beefed up to provide greater strength and longer wear under the rigors of power drills and presses. Several options in fill and shanks are available as indicated. Note: Power brushes must be rotated in clockwise direction only. Several options in fill and shanks are available as follows:Plain Shank1/4"-20 Threaded Coupling8-32 Threaded Coupling3/8" Plain Shank and custom sizes