The method of selecting a wrench tool is as follows.
(1) According to the type of work, choose the right wrench to remove or replace bolts/nuts. It is common to use sets of socket wrenches in car repairs. If the set of socket wrenches cannot be used due to the limitation of working space, the box wrench or the open wrench can be selected.
(2) The usefulness of the tool socket wrench according to the speed of the work is that it can rotate the bolt/nut without re-adjustment, which can quickly turn the bolt/nut. The socket wrench can work in various ways according to the handle installed.
(3) Select the tool according to the torque. If a large torque is required for the final tightening or starting to loosen the bolt/nut, then use a wrench that allows the application of a large torque. The amount of torque that can be applied depends on the length of the wrench handle. The longer the handle, the greater the torque that can be obtained with a smaller force. If an extra-long handle is used, there is a danger of excessive torque and the bolt may break.