Wrench

The utility model belongs to the technical field of wrenches, and discloses a wrench which comprises a middle device, a first locking mechanism, a second locking mechanism, a wrench head and a handle, the middle device comprises a middle rod, a first connecting mechanism and a second connecting mechanism, the first connecting mechanism and the second connecting mechanism are both rotationally connected with the middle rod, and the rotating directions of the first connecting mechanism and the second connecting mechanism are opposite; the wrench head is detachably connected with the first connecting mechanism and provided with a sleeve, and an opening is formed in one side of the sleeve and vertically penetrates through the sleeve. The handle can be detachably connected with the second connecting mechanism. According to the wrench provided by the utility model, the sleeve of the wrench head is provided with the opening, so that the wrench head can be sleeved with the cable gland after penetrating through the wi