Steel: CrV50Bv30 45-47 HRC Chrome plating D1: 32 mm D2: 28 mm Length: 78 mm "Dela Tekhniki" hexagonal socket wrenches are made of chrome-vanadium steel using cold stamping and subsequent heat treatment. The socket wrenches are hardened and protected against corrosion with chrome plating. They 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 work with fasteners on relatively high studs or with deep-seated threaded parts. The special textured surface on the base of the socket wrench improves grip and prevents slipping in hands. You can also purchase sets of extended socket wrenches 1/2" or sets of tools with 1/2" socket wrenches.