Manufactured from Chrome Molybdenum Steel with a black phosphate finish hardened and tempered these sockets withstand very high speed power tools. Each Hex bit is 78mm long giving you greater access too hard to reach places. Specifications: Chrome Molybdenum Steel. SCM440 HRC45. Black phosphate finish. DIN 3121. Hardened and tempered. True impact. 1/2'' inch drive. Blow moulded case. Sizes: H5 H6 H8 H10 H12 H14 H17 H19.