Draper expert 75mm 38 square drive chrome plated wobble extension bar draper expert 9924 expert quality manufactured from chrome vanadium steel hardened tempered and satin chrome plated enables sockets to be driven at up to 15176 to the vertical hexagon end with knurled shaft for extra grip display packedmanufactured and tested generally in accordance with din3122 and iso3315 specifications draper expert 9924 250mm 38 square drive chrome plated wobble extension bar