How to determine the size of a wrench

　　How to determine the size of a wrench

　　1. Determine the wrench size according to the screw specifications

When choosing a wrench, you first need to understand the specifications of the screw. If you already know the size of the screw, you can use the table below to choose the appropriate wrench.

| Screw specifications | Wrench sizes |

| M4 | 7mm |

| M5 | 8mm |

| M6 | 10mm |

| M8 | 13mm |

| M10 | 17mm |

| M12 | 19mm |

　　2. Determine the wrench size according to the shape of the screw

If you don’t know the size of the screw, you can roughly determine the size of the wrench by the shape of the screw. For example, hexagonal screws require a hex wrench, and houndstooth screws require a houndstooth wrench.

3. Determine the size according to the type of wrench

Different types of wrenches have different sizes. Common wrench types include open-end wrenches, combination wrenches, socket wrenches, etc. When selecting a wrench, choose the appropriate wrench type and size based on the job requirements and the type of screw.

　　4. Precautions

When choosing a wrench, you also need to pay attention to the following points:

1. Choose a good quality wrench to ensure service life and effectiveness;

2. When using a wrench, be careful not to use excessive force to avoid damaging the parts or the wrench itself;

3. When using a wrench, choose the appropriate angle and orientation to avoid problems such as unscrewing and reverse screwing.

In short, when choosing a wrench, you should choose according to the specific requirements and circumstances, and choose the appropriate wrench to complete the job.

[End] By reading this article, I believe you already understand how to determine the size of a wrench based on the specification and shape of the screw and the type of wrench. As long as you follow the advice in this article, choosing the right wrench for any job will be easy.