Patent ID: 8667873

Claim:
An open-end wrench comprising: a handle; a first jaw and a second jaw disposed at one end of the handle; a throat section being connected between rear ends of the two jaws; each of the jaws having an inner side serving as a holding face; the throat section defining a recess between the two jaws, the recess having a bottommost point positioned at a center of the throat section; and a toothed section being disposed on the holding face of the first jaw, the toothed section having a plurality of sharp teeth and a wide tooth continuously arranged on the holding face, the wide tooth being positioned behind the sharp teeth, the wide tooth having a largest width among all the teeth; a raised section with a plane face being disposed on the holding face of the second jaw; wherein the bottommost point of the throat section being spaced from a front end of the first jaw by a first length; the wide tooth having a tooth crest; the bottommost point of throat section being spaced from the tooth crest of the wide tooth by a second length, the second length ranging from ⅓ to ½ the first length; the toothed section defining a length, the length of the toothed section being about ⅖ the first length; the width of the wide tooth is 0.325 to 0.375 the length of the toothed section.