Draper expert 16mm 12 square drive deep socket bi hexagon hi torq draper expert 56185 expert quality deep 12 point sockets manufactured from chrome vanadium steel hardened tempered chrome plated and polished for corrosion protection chamfered end allows positive nut location overall length 80mm display packedmanufactured and tested generally in accordance with din3122 and iso3315 specificationsdraper expert hi torq174 is a registered trademark of draper tools ltd draper expert 56