Steel: CrV50Bv30 45-47 HRC Chromizing D1: 16 mm D2: 13 mm Length: 50 mm Hexagonal socket wrenches "Delo Tekhniki" are made of chromovanadium steel using cold stamping and subsequent heat treatment. The socket wrenches are hardened and protected from corrosion by chromizing. They can withstand high and prolonged loads. The hexagonal profile is the best for applying loads to classic hexagonal fasteners. The elongated shape of the socket wrench allows for working with fasteners on relatively tall studs or with deep-seated threaded parts. The special ribbed texture on the base of the socket wrench improves grip characteristics and prevents slipping in hands. You can also purchase sets of elongated socket wrenches 1/4".