A hex key wrench or hexagonal key wrench is a special type of tool, which is mainly used to loosen or tighten hexagonal (hexagonal) screws and bolts. The head of this wrench is usually a hexagon, which fits perfectly with the hexagonal head of the screw or bolt. Hex key wrenches are usually available in various sizes from small to large and can be made of metal or plastic. They usually come in L-form, T-form, or ball-end shapes, which provide practical convenience.
The special advantage of the hex key wrench is that it can be easily used in narrow or confined spaces where a normal screwdriver cannot enter. This wrench is very popular because hex screws are used in many electronics, cars, furniture, and mechanical parts. The use of a hex key wrench not only works efficiently, but also reduces damage to the screw or bolt. Therefore, it is considered an essential tool in any repair or installation of parts.