Set of 20 allen keys in L-Shaped shape from Wera 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. They are bent at 90 degrees, forming two unequal length arms that resemble the Latin letter "L".