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, .5, 3, 4, .5, 5, .5, 6, 8, 10mm