This 12mm Socket 3/8" Drive Metric 310175 is an ideal addition to anyone's tools, whether it be for the garden, garage or DIY. It is a chrome vanadium steel hex metric socket with a fully mirror-polished finish. The socket features a chamfered end for positive nut location and a radius design for added torque and long life. It also has a knurled band and hole for positive ball retention. This product conforms to DIN3124/ISO2725 and DIN3120/ISO1174 standards. Silverline offers a lifetime warranty for all hand tools and a 3-year warranty for power tools, air & petrol tools.