Patent ID: 7228765

Claim:
An adjustable wrench, comprising: a handle; a head portion formed at one end of said handle, said head portion further including a fixed jaw and a movable jaw, said fixed jaw and said movable jaw forming a clip surface for clipping a screwed part, said movable jaw being provided with a slide rod at a bottom side thereof that is retained along a slot extended transversely across said head portion; and an adjusting unit controlling the displacement of said movable jaw along said slot; whereby the ratio of a maximal outer width defined by the distance between outer lateral walls of said fixed and movable jaws when they are most widely opened to a maximal inner width defined by the distance between inner facing walls of said fixed and movable jaws when they are most widely opened will be less than or equal to 210% and greater than or equal to 150%; and wherein said maximal outer width is defined by the distance between two imaginary parallel planes both perpendicular to said slot and respectively tangent to the most bulged point on said outer lateral wall of said fixed jaw and the outermost end of said slide rod of said movable jaw.