Steel: CrV50Bv30 45-47 HRC Chromization D1: 8 mm D2: 12 mm Length: 50 mm Hexagon socket wrenches "Delo Tekhniki" are made of chrome-vanadium steel using a cold stamping method followed by heat treatment. The socket wrenches are hardened and protected from corrosion by chromization. They can withstand high and prolonged loads. The hexagonal profile is the best in terms of applying loads to classic hexagonal fasteners. The elongated shape of the socket wrench allows for working with fasteners on relatively high studs or with threaded parts that have a deep installation. The special ribbed pattern on the base of the socket wrench improves grip characteristics and prevents slipping in hands. You can also purchase sets of extended socket wrenches 1/4".