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12 Workshop Key Names Along with Images and Their Functions

22 October 2025
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Knowing the names of workshop wrenches along with their functions can provide insight and benefits for you. This is because you will need some of these tools when you want to repair car components on your own. 

Names of Workshop Wrenches and Their Functions

Previously, we discussed various types of mechanical measuring tools. Now, this discussion is about knowing the names of workshop wrenches.

Here are some names of workshop wrenches that you need to know along with images and their functions:

1. Ring Wrench

Ring Wrench

This wrench is used to loosen and tighten nuts or bolts. This wrench has a characteristic shape with a hexagonal jaw and a long handle. This produces a considerable lever force.

2. Open-End Wrench

Open-End Wrench

This wrench has a shape like a bull's horn at the ends of the wrench. The open-end wrench itself has a diameter size ranging from 6mm to 36mm, allowing you to tighten bolts and nuts according to the correct size.

3. Combination Wrench

Combination Wrench

As the name suggests, this wrench has a design that is half open-end and half ring wrench. One end is shaped like an open-end wrench, and the other end is round with a hexagonal hole typical of a ring wrench. Its function is the same as the open-end and ring wrenches, which is to tighten and loosen bolts or nuts.

Read Also: The Function of Ring & Open-End Wrench is Different, Here’s How to Use It

4. Adjustable Wrench

Adjustable Wrench

This wrench is used to loosen or install bolts and nuts when the installation or removal process cannot be handled using a ring or open-end wrench. The jaws of this wrench can be widened or narrowed according to the screw near the jaws.

5. L Wrench or Allen Wrench

L Wrench or Allen Wrench

As the name suggests, this wrench has a shape like the letter L. This wrench comes in various sizes ranging from 2 mm to 22 mm with hexagonal and star-shaped ends. 

6. Socket Wrench

Socket Wrench

In terms of shape, this wrench resembles an open-end wrench. Its function is also the same, which is used to loosen or install bolts or nuts. This wrench is used when the open-end wrench cannot reach the installation or removal of bolts and nuts. The socket wrench has a socket shaft that can be adjusted to the ends of the nuts, bolts, and sockets.

7. Spark Plug Wrench

Spark Plug Wrench

As the name suggests, this wrench is used to tighten, loosen, remove, and install spark plugs. This wrench comes in different sizes depending on the size of the spark plug used in the car.

8. Pipe Wrench

Pipe Wrench

A pipe wrench is usually used to install and remove pipes or to grip cylindrical components of a car. A pipe wrench can also be used as a substitute for an open-end wrench if the open-end wrench cannot reach the angle of the nut removal.

Read Also: The Function of T Wrench as a Car Mechanical Tool & How to Use It

9. Wheel Wrench

Wheel Wrench

This wrench has a shape resembling the letter X and has holes at each end that correspond to the size of the car wheel nut. The holes in the wheel wrench have different sizes to match the sizes of the wheel nuts such as 21mm, 19mm, and 16mm.

10. Ratchet Wrench

Ratchet Wrench

The ratchet wrench is part of the socket wrench components. The function of this wrench is to loosen and install bolts and nuts that are already loose. This wrench will speed up the process of loosening or installing bolts and nuts. You also do not need to struggle to remove the socket wrench that is stuck to the nut and bolt head.

11. Valve Wrench

Valve Wrench

In terms of shape, this wrench is similar to a ring wrench. However, this wrench is used to open bolts that are attached to brake pipes or connections on the injector line. This wrench is designed to be more precise than the open-end and ring wrenches so that it does not damage the bolt head.

12. Torque Wrench

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