The main purpose of a Hex key or an Allen wrench is of course to screw and unscrew socket head screws, commonly known as hexagon screws. Hexagon screws are very often found in the design of prefabricated furniture, there are also usually at least one or two Allen keys in the package of screws. Cycling is also a big consumer of hexagon screws, they are used in the assembly of all parts of the bike, such as the frame, brakes, gear shift system, etc. With Ronix RH-2034 9pcs long arm hex key set, it is impossible to lose a wrench, since they are all connected by a modern holder, so it is a practical set of wrenches, easy to carry and with a small footprint. The kit includes the following Allen key sizes: 1.5, 2, 2.5, 3, 4, 5, 6, 8, and 10 mm.