Ratchet wrench

A ratchet wrench, comprising:

• a wrench body having a working end defining a stepped hole that includes an outer large-diameter portion, an inner small-diameter portion and a shoulder disposed at a junction of the outer large-diameter portion and the inner small-diameter portion, wherein the working end further defines an annular groove in an inner wall of the outer large-diameter portion of the stepped hole;
• a ratchet wheel rotatably mounted in the stepped hole of the wrench body, and having a row of teeth therearound and a flange located proximate to the teeth, wherein the flange rests upon the shoulder of the stepped hole of the working end of the wrench body;
• and
• a C-ring placed around the ratchet wheel, resting upon an upper surface of the flange of the ratchet wheel, and configured and sized to be detachably engaged in the annular groove in the inner wall of the outer large-diameter portion of the stepped hole for retaining the ratchet wheel within the stepped hole of the working end of the wrench body.