Manufactured from Chrome Molybdenum Alloy 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. Ideal for the engineering trade in the industrial sector. Made by professionals for professionals. Specifications • Sizes: 1/4", 5/16", 3/8", 7/16, 1/2", 9/16", 5/8" and 3/4" • Length: 78mm • Professional quality • Chrome Molybdenum Alloy Steel • Black phosphate finish • DIN 3121 • Hardened and tempered • True impact • 1/2" inch drive • Blow moulded case