Steel: CrV50Bv30 45-47 HRC Chroming D1: 15 mm D2: 22 mm Length: 78 mm The "Delo Tekhniki" twelve-sided socket wrenches are made of chrome-vanadium steel using cold stamping method with subsequent heat treatment. The socket wrenches are hardened and protected against corrosion by chroming. They can withstand high and prolonged loads. The twelve-sided profile provides greater freedom for positioning the socket wrench on the fastener. The angle of rotation between the faces of the fastener is 30°. It is used for working with twelve-sided and hexagonal profile fasteners. The elongated shape of the socket allows for working with fasteners on relatively high studs or with threaded components with deep seating. The special ribbed texture on the base of the socket wrench improves grip characteristics and prevents slipping in the hands. You can also purchase: a set of 12-sided extended sockets 1/2" or a tool set with socket wrenches 1/2".