Clean up axle studs for the best fit when installing new wheels, thread on nut covers and wheel centering sleeves. Heavy duty, high quality solid aluminum stud brush attaches to the drill or impact tool and makes fast work of cleaning the studs. No reverse rotation of drill required. One pass thoroughly cleans studs in minutes. 3/8" drive for use with an electric or air tool. Three stainless steel brushes included. For longer brush life, run tool counter-clockwise at 2000 RPM or less. Fits 5/8", 9/16" and 14mm studs up to 4" long. Made in the USA.