Steel: CrV50Bv30 45-47 HRC Chromium plating D1: 22 mm D2: 21 mm Length: 78 mm Hexagonal socket wrenches "Delo Tekhniki" are made of chrome-vanadium steel using cold stamping method with subsequent heat treatment. The socket wrenches are hardened and protected from corrosion by chromium plating. They are resistant to high and prolonged loads. The hexagonal profile provides the best load application for classic hexagonal fasteners. The elongated shape of the socket wrench allows working with fasteners on relatively high studs or with deep-seated threaded parts. The special knurled pattern on the base of the socket wrench improves gripping characteristics and prevents slipping in hand. You can also buy sets of extended socket wrenches 1/2" or sets of tool kits with socket wrenches 1/2''