Ratchet wrench

A ratchet wrench comprising:

• a handle having a head section at one end of the handle, the head section has a circular hole passing through the head section from an upper side to a lower side thereof, a circumferential wall of the circular hole being formed with a cavity, a shaft hole being formed on a top face of the handle and communicating with the cavity, a wall of the shaft hole having a plurality of locating sections;
• a ratchet wheel, an outer circumference of the ratchet wheel having multiple continuous teeth, the ratchet wheel being rotatably installed in the circular hole;
• left and right symmetrical dogs received in the cavity and arranged side by side in a left and right side of the cavity, a face of each dog facing the ratchet wheel having teeth arranged in an arched form for engaging the teeth of the ratchet wheel, an inner end of each dog being formed with a recess, the two recesses of the dogs are positioned opposite to each other to form receiving spaces;
• two resilient members in the cavity respectively, each acting on one of the two dogs to resiliently bias the dogs toward the ratchet wheel;
• a shifting member having a symmetrical left and right end, the left and right ends of the shifting member are disposed in the recesses of the dogs, a center of the shifting member having an insertion hole;
• and,
• a rotary switch extending through the shaft hole into the cavity, a bottom end of a rotary section of the rotary switch including a shaft section, a bottom end of the shaft section is inserted into the insertion hole, the shaft section including a fixing device, whereby the fixing device is engaged with one of the plurality of locating sections.