9pc Hex Key Socket Bit Set - 3/8" Square Drive 4mm to 12mm - PREMIUM S2 SteelOverview: Professional heat treated Chrome Vanadium steel sockets. Fully polished black chrome finish with machined and lacquered surfaces. Steel hex bits with a phosphate finish. Knurled rings for extra grip with oily fingers. Supplied on socket rail.Features: Professional heat treated Chrome Vanadium steel sockets. Fully polished black chrome finish with machined and lacquered surfaces. Steel hex bits with a phosphate finish. Knurled ring for extra grip with oily fingers. Contents: 4, 5, 6, 7, 8, 9, 10, 11, 12mm. Supplied on socket rail. Lifetime guarantee*. Specification: Contents - 3/8"Sq Drive 45mm Hex Key Socket Bits; 4, 5, 6, 7, 8, 9, 10, 11, 12mm Drive - 3/8" Net Weight - 0.415kg Further Information: We sell a wide variety of tools & workshop equipment for both the DIY and Professional markets. With well over 10,000 lines of equipment suiting all jobs big or small, our online store has it all. If you can’t quite find what you are looking for, please feel free to contact us and we’ll be more than happy to help.Alias: ys01861