This Teng Tools 1/2 inch square drive Torx socket is manufactured from high quality chrome vanadium steel to conform to all the latest DIN and ISO standards. The socket is branded and labelled for easy identification, and specially designed to help prevent damage to fastenings.The TENM120711 TX-E 1/2inch square drive socket has the following specifications:Overall length 37.8mm.Size. 9.7mm (E11).