Professional individual M16 security spline impact socket bit for use with 1/2" drive impact wrench, ratchet or extension bar. Overall length of 78mm. Made of hardened and tempered Chrome Molybdenum (Cr-Mo) steel with manganese phosphate finish for extra corrosion resistance. Feature retaining groove for extra grip and maximum safety. Manufactured for professional daily use with air or battery powered impact wrench. Supplied as individual security spline impact socket bit.