Designed to clean up and repair threaded fasteners and studding quickly and safely. Fitted with 3 x HSS blades to remove damaged metal and burrs. Features a 1/4"Hex shank for use with a drill or hex driver. Applicable for use on pieces from 3mm to 19mm in diameter. Suitable for use with a variety of compounds including stainless steel, hardened steel, mild steel, copper, brass, plastic and many more. Unit is much faster and more accurate than using a file or angle grinder.