Hex keys (short for hexagon keys) and Torx keys (a derivision of torque) allow easy insertion of the blade into the head of the fixing. They were both designed to prevent slippage when tifghtening or undoing the hex (used to be called Allen Keys after the Allen Manufacturing company). This also applies to Star keys. Greater pressure can be applied to a hex key or torx key than a screwdriver allowing greater security at the same time.The Irwin hex and torx key sets are ideal for the toolbag as they have all major sizes in a strong and very usefull set.
Post time: Jul-13-2017