Patent ID: 6952985

Claim:
An adjustable spanner comprising: a holding portion installed at one end of the spanner body; a retaining jaw installed at another end of the spanner body; a movable jaw installed to the retaining jaw; the movable jaw being slidable along a slide track at a head portion of the spanner body; and the lower side of the movable jaw having a plane; a neck portion extended from the plane of the movable jaw; and a round cylinder engaging portion extended from a lower side of the neck portion; wherein two sides of the upper end of the slide track are formed with respective auxiliary projecting track; two sides of a lower edge of the movable jaw are formed with respective inclined planes; the inclined planes are reduced toward the neck portion so as to enhance the strength of the structure; the inclined planes are configured to be matchable to the two auxiliary projecting tracks; each auxiliary projecting track is extended from a respective upper surface of the slide track with an angle between 60 to 85 degrees so as to enhance the strength of the adjustable spanner; and wherein the movable jaw, the neck portion and round cylinder engaging portion are integrally formed.