A wrench is a commonly used installation and disassembly 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. Wrenches are usually made of structural steel made of carbon or alloy materials.

Wrenches usually have openings or sockets on one or both ends of the handle to hold bolts or nuts. When used, external force can be applied to the handle in the direction of thread rotation to turn the bolt or nut. Manual wrench, also known as ordinary wrench, is mainly used in ordinary life and work. Its use is relatively simple, mainly divided into single head wrench, double head wrench, adjustable wrench, plum blossom wrench, multi-purpose wrench, tapping wrench, socket wrench, socket screwdriver, torque wrench, cross wrench, ratchet wrench, hook wrench, hexagonal wrench, square wrench, manual clutch torque wrench, pipe wrench, T-shaped wrench, L-shaped wrench, three-way wrench, crescent wrench, oil tank wrench, tire wrench, spark plug wrench, filter wrench, combination wrench, other wrenches, etc. Torque wrenches are divided into sound wrenches, pointer wrenches, and digital wrenches.

Use of manual wrench

1. Choose the appropriate wrench based on the characteristics of the fasteners being tightened.

2. Tighten by gripping the end of the handle and applying force in a clockwise direction; Loosen and rotate counterclockwise.

Advantage

1. It can work quickly, with a working speed three to four times faster than traditional wrenches and even faster than fast wrenches. 2. An open-end wrench can be used for 2-6 types of screws, while a double headed wrench is only suitable for 2 types of screws. One open-end wrench is equivalent to 2-3 solid wrenches, which is equivalent to an adjustable wrench but can work quickly without adjusting the opening. 3. Long service life, unable to break, and the front quick wrench is prone to breakage. 4. The manufacturing process is simple, and its cost is lower than that of a regular wrench. 5. Lightweight, easy to carry, and effortless to work with.