Tipton Power Clean Electric Gun Cleaning Brush Kit is powered by 4 AA batteries (not included) for portability and long life. Features a soft touch rubberized handle and power switch. Working in pulse or continuous modes, scrubs at 3600 oscillations per minute. Includes interchangeable bristle brush heads: plastic, stainless steel, and bronze. Adapter head that accepts 8-32 threaded cleaning brush tips (nylon 22 caliber brush included). Power handle is sealed and resistant to gun-cleaning solvents and oils. Bristle heads are 3/4 diameter. .22 cal. nylon brush is included.