Steel: CrV50Bv30 45-47 HRC Chromizing D1: 8 mm D2: 12 mm Length: 25 mm Hexagon sockets "Dela Tekhniki" are made of chrome-vanadium steel using cold stamping with subsequent heat treatment. The sockets are hardened and protected against corrosion by chromizing. They can withstand high and prolonged loads. Hexagonal profile is the most suitable for applying loads to classic hexagonal fasteners. A special ribbed pattern on the base of the socket improves grip characteristics and prevents slipping in hands. You can also buy sets of 1/4" hexagon sockets.