| 摘要 |
A wrench for holding one fastener element of a nut-and-bolt fastener against rotation while the other fastener element is turned to tighten or loosen the fastener. The wrench comprises a wrench plate having a plurality of different size openings for fitting fastener elements (e.g., the bolt) of different sizes, the wrench plate being engageable with an adjacent part when the other fastener element (e.g., the nut) is turned for holding the one fastener element against rotation, and a resilient material affixed to one face of the wrench plate, the resilient material projecting a relatively small distance beyond an edge of each opening for resilient engagement by the one fastener element (e.g., the bolt) when the latter is fitted into the opening. The resilient engagement of the fastener element and the resilient material holding the wrench plate in a fixed, self-retaining position with respect to the one fastener element prior to turning the other fastener element whereby both hands may be used to turn the latter for tightening or loosening the fastener.
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