The socket wrench is a special manual tool for tightening or loosening the unloading screw. It is mainly used for tightening and adjusting the rolling bearing mounted on the cone type thrust neck, the tightening set sleeve and the unmounting sleeve.Socket wrenches are generally attached with a set of various specifications and models of socket head and its rolling handle, connecting rod, universal joint, rotary connection head, elbow handle for the hexagon nut.

Do you know the rules and regulations of socket wrenches in the world?

The calculation method of socket wrench specification is different in China and overseas. In China, it is calculated by Chinese computing enterprises and called metric system.Overseas to the United States computing enterprises as the standard, called the British system.

1 inch =2.54cm is so calculated in the general calculation, but some manufacturers of socket wrenches also immediately calculated it as 1 inch =2.5cm, so the commodity standard value in the manufacturing industry is not very accurate, but for large factories are all calculated according to the previous one.This is the most basic national standard.There are some omits in the metric system, and there are some differences in size between metric and British socket wrenches, but generally they are universal.