Draper expert 27mm 12 square drive diesel injector socket 6 point draper expert 71393 expert quality 12 point socket forged from chrome vanadium steel hardened tempered and chemically blacked polished for corrosion protection for use on audi and volkswagen models display packedmanufactured and tested generally in accordance with din3122 and iso3315 specifications draper expert 71393 30mm 12 square drive 12 point hub nut socket