| 摘要 |
An adjustable wrench for gripping hexagonal and other shaped heads includes two slightly non-parallel jaw faces, wherein one face is smoother than the other. The angle between the two jaw faces is extremely shallow to create a "snap-action" geometry. Combining that geometry with jaw faces of unequal roughness can result in a desirable binding action that causes the wrench to tightly grip the head. In some cases, the wrench will continue clinging to the head even after the user releases the handle of the wrench.
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