Steel: CrV50Bv30 45-47 HRC Chrome-plating D1: 36 mm D2: 31 mm Length: 77 mm The "Delo Tekhniki" twelve-sided socket wrenches are made of chrome-vanadium steel using cold stamping and subsequent heat treatment. The socket wrenches are hardened and protected from corrosion by chrome-plating. They are resistant to high and prolonged loads. The twelve-sided profile allows for greater flexibility in positioning the wrench on fasteners. The turning angle of the wrench between the faces of the fastener is 30°. It is used in work with twelve-sided and hexagonal fastener profiles. The elongated shape of the wrench allows for working with fasteners on relatively high studs or with threaded parts of deep seating. The special serrated pattern on the base of the wrench improves grip characteristics and prevents slipping in hands. You can also purchase a set of 12-point extended sockets 1/2'' or a set of tools with socket wrenches 1/2''.