Explosion proof valve wrench is mainly a wrench used to tighten valves. It is a manual tool that uses the lever principle to turn bolts, screws, nuts, and other threaded fasteners that hold the opening or socket of bolts or nuts. There are many types of valve wrenches, and the following are some of the more important ones: Plum wrench: a working end with hexagonal or twelve angled holes at both ends, suitable for situations where the working space is small and ordinary wrenches cannot be used. Dumb wrench: A fixed sized opening made at one or both ends, used to turn nuts or bolts of a certain size. Dual purpose wrench: One end is the same as a single headed wrench, the other end is the same as a ring wrench, and both ends are used to turn bolts or nuts of the same specifications. Active wrench: The opening width can be adjusted within the size range, and it can turn bolts or nuts of different specifications. Torque wrench: It can display the applied torque when turning bolts or nuts; Or when the applied torque reaches the specified value, it will emit a light or sound signal. Torque wrenches are suitable for assembly work with clear specifications for torque magnitude. Socket wrench: It is composed of multiple sockets with hexagonal or twelve pointed holes and equipped with various accessories such as handles and extension rods, especially suitable for turning bolts or nuts with very narrow or deeply recessed positions.

Hexagonal wrench: an L-shaped hexagonal bar wrench designed for turning hexagonal screws. The model of an Allen wrench is based on the dimensions of the opposite sides of the hexagon, and the size of the bolt varies.