• One of a comprehensive range of Premier Hand Tools, suitable for daily professional use.• Chrome Vanadium steel Total Drive® sockets, hardened and heat treated for strength.• Half chrome/satin finish with knurled ring for corrosion resistance and extra grip - even with oily fingers.• All sockets are equivalent to Metric hex and bi-hex sockets with many being also equivalent to Imperial hex, Imperial bi-hex and TRX-Star* sockets.• Rail mounted for ease of storage and socket selection.• Sizes: 4, 4.5, 5, 5.5, 6, 7, 8, 9, 10, 11, 12, 13, 14mm.• Lifetime guarantee*.Chrome Vanadium steel Total Drive® sockets, hardened and heat treated for strength. Half chrome/satin finish with knurled ring for corrosion resistance and extra grip - even with oily fingers. All sockets are equivalent to Metric hex and bi-hex sockets with many being also equivalent to Imperial hex, Imperial bi-hex and TRX-Star* sockets. Supplied on rail.• Hardened and tempered Chrome Vanadium steel Total Drive® sockets with