If you are looking around for a good t-handled hex key set in metric, check out this ten piece set from ATD (Advanced Tool Design). This set includes sizes 2mm, 2.5mm, 3mm, 4mm, 4.5mm, 5mm, 5.5mm, 6mm, 8mm and 10mm. The customized rack is made out of steel and holds all of the sizes for your convenience, while the handle grips are made of plastic, which increases the turning power for you and provides more comfort, which can really come in handly when you are repeatedly using your hex keys. These are very sturdy, since the shafts have been manufactured from a high quality steel. When you figure that you will get a great set of hex keys, fast shipping, a reasonable price AND from a family owned tool store - what more could you want?