What are the basic types of wrenches?

Dead wrench and adjustable wrench, the former refers to the wrench with a fixed number written on it, and the latter is the adjustable wrench.
1. Open spanner: One or both ends have a fixed size opening for screwing nuts or bolts of a certain size.
2. Torx wrench: Both ends have working ends with hexagonal holes or twelve-angle holes, suitable for occasions where the working space is narrow and ordinary wrenches cannot be used.
3. Dual-purpose wrench: one end is the same as the single-stay wrench, the other end is the same as the torx wrench, both ends are screwed with bolts or nuts of the same specification.
4. Adjustable wrench: The width of the opening can be adjusted within a certain size range, and it can turn bolts or nuts of different specifications. The structural feature of the wrench is that the fixed jaws are made into flat jaws with fine teeth; one end of the movable jaws is made of flat jaws; the other end is made of concave jaws with fine teeth; push the worm down to move The jaws can be quickly removed and the position of the jaws can be changed.
5. Hook wrench: also known as crescent wrench, used to turn flat nuts with restricted thickness.
6. Socket wrench: It is composed of multiple sockets with hexagonal holes or twelve-angle holes and equipped with handles, posts and other accessories. It is especially suitable for screwing bolts with very narrow positions or deep recesses. Or nuts.
7. Hexagon socket wrench: L-shaped hexagonal rod-shaped wrench, specially used for turning socket screws. The model of the hexagonal wrench is based on the size of the opposite side of the hexagon, and the size of the bolt has national standards. Purpose: It is specially used for fastening or disassembling round nuts on machine tools, vehicles and mechanical equipment.
8. Torque wrench: It can display the applied torque when turning the bolt or nut; or when the applied torque reaches the specified value, it will emit a light or sound signal. Torque wrenches are suitable for installations with clearly defined torque.