01 First of all, we need to know that a single Socket Wrench cannot be used, and it can only be used in combination with matching tools. Therefore, we often see socket wrench sets in our life, that is, the tools shown in the figure below 02 What common tools are included in this kit? Generally, there are socket wrenches, socket heads, screwdriver sockets, extension rods, etc; 03 The most common combination is the socket wrench+socket head. Everyone has seen a square protrusion in front of the socket wrench, commonly known as the ratchet head, while both sides of the socket are hollow. Insert the ratchet head of the socket wrench into the quadrilateral side of the socket. Of course, the size should match; 04 In a set of socket wrench combination tools, there is usually only one socket wrench, while there are many corresponding socket heads. However, all socket heads have the same size on the quadrilateral side, with the difference between the hexagon or the dodecagon on the output end; 05 In addition, we will use the extension rod or universal joint according to the actual use needs. To save effort, we sometimes add an extension rod between the socket wrench and the socket head
