| 摘要 |
An adjustable rack type crescent wrench that allows the user to quickly and easily change the distance between the jaws of the wrench and then to automatically engage a nut or bolt head when the wrench is in position. The wrench includes an internal spring type mechanism that is engineered and designed to engage one end of the movable jaw assembly so that when the jaw is extended into the open position, it can then be released by the user pressing down on an operator mechanism that releases the worm gear from the rack of the movable jaw which instantly adjusts the distance between the jaws in a manner to securely grasp the flat portions of a nut bolt head or like fastener, while still allowing final, slight, adjustments to the position of the jaws by virtue of the ability to manipulate the sliding jaw with the worm gear.
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