Elora 1in square drive bi hexagon metric sockets elora 67400 professional quality manufactured from 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 sold loosemanufactured to din 3124iso 2725 and din 3120iso 1174 specifications elora 67400 80mm 1 square drive bi hexagon socket