General description Manufactured from Chrome Vanadium steel, the Premier 31 Piece 1/4" Sq Drive Socket & Colour-Coded Bit Set AK2111 is designed for general workshop use. This set features a popular range of sockets and bits, all of which are hardened and tempered with a fully polished mirror finish for enhanced resistance to corrosion. The knurled ring sockets provide improved grip, while the colour-coded satin chrome bits allow for fast identification. Technical specifications Material: Chrome Vanadium steel Socket sizes: 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14mm Bits included: Slotted (4, 5, 6mm), Phillips (#1, #2, #3), Pozi (#1, #2, #3), TRX-Star* (T10, T15, T20, T25, T27, T30), Hex (4, 5, 6mm) Includes: 50mm extension bar, 72-Tooth 1/4" Hex - 1/4" Sq Drive micro ratchet bit driver/wrench Compatibility and accessories 50mm extension bar 72-Tooth 1/4" Hex - 1/4" Sq Drive micro ratchet bit driver/wrench Other information Supplied in a storage case Lifetime guarantee*