Set of 10 allen keys in T-Shaped shape from Unior company. A hex key is ideal for any type of use by any professional mechanic, plumber, carpenter, electrician, as well as for household use. Hex keys are formed from a single piece of hexagonal rod made of hardened steel with chamfered ends that fit comfortably into similarly shaped screw sockets. Due to their shape (ball-end), they allow you to exert more pressure, making the work less tiring.