Counteract’s Stud Brush is designed to quickly and effectively clean rust, and corrosion from the surface of wheel studs, it has the ability to effectively clean 10 studs in under 3 minutes. The 22mm tool is designed for use on Commercial Truck and Bus applications that use a standard 22mm wheel stud. The tool comes pre-loaded with a 22mm brush insert, but is able to hold replacement brush sizes 18mm, 20mm and 22mm (sold separately) The brush inserts are held in place by 3 allen screws for a quick and easy change. Each brush is capable of cleaning well over 100 wheel studs, depending on their condition. Each tool comes with a detachable 1/2″ drive for use with Counteracts Low Speed Air Driver (sold separately or in a kit), or your battery powered drill. We do not recommend the use of an impact gun as the tool does not require that force. Simply allow the brush to do the work. Forward onto the stud, Reverse off.