Steel: CrV50Bv30 45-47 HRC Chrome-plating Set composition: - Long hexagonal sockets 1/4": 4; 4.5; 5; 5.5; 6; 7; 8; 9; 10; 11; 12; 13; 14 mm; - Metal socket rail 976 013 . Hexagonal socket wrenches "Delo Tekhniki" 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 can withstand high and prolonged loads. The hexagonal profile is the best when it comes to applying loads to classical hexagonal fasteners. The extended shape of the socket wrench allows you to work with fasteners on relatively high studs or with deeply-seated threaded parts. The special ribbed tread on the base of the socket wrench improves grip characteristics and prevents slipping in hands.