Reading (c) common sense

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The wrench is a hand tool that uses the principle of the lever to turn bolts, screws, nuts, and other threads to hold the openings or sleeve holes of bolts or nuts. The wrench usually has a shank portion at one or both ends, which is used to apply external force to turn the bolt or nut to hold the opening or sleeve hole of the bolt or nut. When the shank portion is used to apply external force along the direction of thread rotation, the bolt or nut can be turned. Wrenches are usually made of carbon or alloy structural steel. Chromium-vanadium (with the element symbol of Cr-V) steel is used in this site.
The following are the common types of wrenches:
Wrench: This type of wrench has a fixed-size opening at one or both ends to turn a nut or bolt of a certain size. The dead spanner is also called open-end wrench, which is single- or double-headed.
Torx wrench: This type of wrench has working ends with hexagonal holes or 12-cornered holes at both ends, which is suitable for situations where the working space is narrow and ordinary wrenches cannot be used. Compared with open-end wrenches, plum wrenches have high strength and do not easily fall off during use. However, plum wrenches are difficult to attach and remove. Moreover, plum wrenches are usually heat treated after forging.
Dual-use wrench: One end is the same as a single-headed spanner, and the other end is the same as a Phillips wrench. These two ends can turn bolts or nuts with different specifications.
Adjustable wrench: The width of the opening of this type can be adjusted within a certain size range. Thus, this wrench can turn bolts or nuts with different specifications.
Hook wrench: This type of wrench, which is also known as crescent wrench, is used to turn flat nuts with a limited thickness.
Socket wrench: This type of wrench is composed of multiple sockets with hexagonal holes or 12-cornered holes and equipped with a variety of accessories, such as handles and posts. This wrench is particularly suitable for turning bolts or nuts with narrow or deep recesses. The socket wrench is mainly composed of a socket head, a handle, a ratchet handle, a quick rocker, a joint, and a post. Various handles are suitable for various occasions. Based on the principle of easy operation or improved efficiency in this website, a universal skater has the advantages of convenience, speed, and portability. Many special socket wrenches, such as spark plug sockets, hub sleeves, and tire nut sleeves, are also used in automobile repairs.
Hexagonal wrench: The L-shaped hexagonal rod wrench is particularly used to turn hexagonal bolts (plugs).
Torque wrench: This type of wrench is used to apply a specific torque to turn the bolt or nut. When the applied torque reaches the specified value, this wrench emits a light or sound signal. The torque wrench issuitable for assembly work with clearly defined torque.