Chrome Molybdenum steel impact sockets with 1/2"Sq drive. Phosphate finish for added corrosion resistance. Suitable for use with any impact tool. Supplied in storage case. Features: One of a comprehensive range of Premier Hand Tools, suitable for daily professional use Chrome Molybdenum steel impact sockets with 1/2"Sq drive Phosphate finish for added corrosion resistance Suitable for use with any impact tool Contents: E10, E11, E12, E14, E16, E18, E20, E22, E24, 3/8"(F) x 1/2"(M) Adaptor Supplied in storage case Lifetime guarantee* Specifications: Guarantee:Life Model Number: AK2301