The BlueSpot Tools Metric T-Handle Hex Key Set is manufactured from chrome vanadium steel and fitted with a heavy-duty ergonomic plastic grip. Keys are also double-sided with one long part and one short. The set comes complete with a rack which has 2 mounting holes so that it can be easily fixed to a bench or wall. It also helps keep the hex keys in size order as each key fits neatly into its own space on the rack. Sizes 2, 2.5, 3, 4, 4.5, 5, 5.5, 6, 8, 10mm