A socket wrench is a tool used to tighten or loosen rounded metal objects. It consists of upper and lower jaws with teeth to grip objects and comes in various sizes and types. It should not be used on hard metals or square objects. The three main types are straight, offset, and end socket wrenches. Each has its own unique purpose and specifications.
A socket wrench is an aluminum or steel tool used to grip and then tighten or loosen rounded metal objects, such as bolts, pipes or rods. A socket wrench consists of an upper hook jaw and a lower heel jaw connected to a flat handle. The jaw pieces have small teeth or grooves to grip rounded objects when rotated, and the lower jaw can be adjusted up or down to fit the size of the metal object. Socket wrenches come in a variety of sizes and types.
This type of wrench should not be used on hard metals, such as steel, or on square objects, as the teeth of the wrench can damage the surface. Also, there should be a 0.5 inch (12mm) gap between the back of the hook jaw and the surface to apply the right amount of grip and to avoid damage to the object, key or person. If damaged, a socket wrench, also called a Stillson wrench, can be repaired by purchasing a tooth and jaw kit.
There are three main types of socket wrenches: the straight socket wrench, the offset socket wrench and the end socket wrench. Other types of wrenches include the compound lever wrench, chain box wrench, and strap wrench. Each of these tools has its own unique purpose and specifications.
The straight wrench is the original socket wrench designed by Daniel C. Stillson in 1869. A straight wrench is the most popular general purpose wrench and is an essential part of any tool set. Wrenches are measured by handle length, and a straight wrench can be purchased in sizes ranging from 9 to 60 inches (about 23 to 152 cm).
An offset wrench is designed to be used in tight spaces where there is little or no room to swing the handle of the wrench. They are also useful for turning objects that are at an awkward angle or when a tube is parallel to another object. The hook jaw of an offset wrench is positioned parallel to the handle of the wrench and has a narrower jaw head.
The end pipe wrench is used on the portions of a pipe that are close to the wall or where the pipe changes direction. The hook jaw and heel of the wrench are angled slightly to the handle of the wrench, making this tool very useful in tight spaces. The wrench can also be useful when working on hanging pipes.
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