ATD Tools 8320 20-Piece Twisted Wire Tube Brush Set

This set is perfect for cleaning internal surfaces such as threaded holes or tubes. It can be used manually or with power drill/driver. The set includes 1/4 inch quick-disconnect soft grip manual driver handle, 1/4 inch quick-disconnect 6 inches extension adapter for manual driver or power drill/driver, 6 stainless steel bristle twisted wire tube brushes - 1/4 inch, 3/8 inch, 1/2 inch, 5/8 inch, 3/4 inch and 1 inch diameters, 6 brass bristle twisted wire tube brushes - 1/4 inch, 3/8 inch, 1/2 inch, 5/8 inch, 3/4 inch and 1 inch diameters and 6 nylon bristle twisted wire tube brushes - 1/4 inch, 3/8 inch, 1/2 inch, 5/8 inch, 3/4 inch and 1 inch diameters.