Draper expert 7 x 55mm 12 square drive hexagon socket bit draper expert 55651 expert quality socket with insert bit socket manufactured from chrome vanadium steel hardened tempered and chrome plated the bit is made from s2 silicon steel hardened and tempered with sand blast finish overall length including socket 55mm display packed draper expert 55651 12 x 55mm 12 square drive hexagon socket bit