Draper Metric Socket Set On A Metal Rail, 1/4" Square Drive - B13M/SRExpert Quality, 6 point socket manufactured from chrome vanadium steel, hardened and tempered with a micro satin finish. Each socket has a knurled ring for extra grip. Supplied on a metal socket rail for secure storage. Manufactured and tested generally in accordance with DIN3122 and ISO3315 Specifications Key Features Expert Quality 13 piece Draper Metric Socket Set designed for durability and performance, featuring 6 point sockets made from high