Steel: CrV50Bv30 45-47 HRC Chroming D1: 24 mm D2: 22 mm Length: 78 mm The "Delo Tekhniki" twelve-sided sockets are made of chrome-vanadium steel using cold stamping and subsequent heat treatment. The sockets 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 on the fastener. The angle of rotation between the faces of the fastener is 30°. They are used to work with twelve-sided and hexagonal fastener profiles. The elongated shape of the socket allows for working with fasteners on relatively high studs or with deeply seated threaded parts. The special textured base of the socket improves gripping characteristics and prevents slipping in hands. You can also buy: - Set of 12-sided elongated sockets 1/2'' or - Tool set with 1/2'' sockets.