The tool has been developed for speedier tightening of threaded studs with the help of impact wrench. It is ideal for use in assembly and maintenance of engines. The range covers stud diameters M6 to M36 (Metric), ¼ to 1 ½ inch UNF (SAE/British) in 3/8 inch (10mm) to 1 inch (25mm) square drives. The tool has cross-hole and groove for locking pin and ring.