Add the Elora 67509 3.1/8\", 1\" Sq. Dr. Bi-Hexagon Socket to your kit With Professional Quality, The Elora 67509 is manufactured from chrome vanadium steel hardened, tempered and chrome plated for corrosion protection. The Chamfered end allows positive nut location and entry. This Elora 67509 features a hole for driving accessory with a locking pin.  Features: Chrome vanadium steel hardened, tempered and chrome plated for corrosion protection Chamfered end allows positive nut location and entry Hole for driving accessory with locking pin Specification: Size: 3.1/8\"