| 摘要 |
A reversible wrench with a selector which may be shifted to determine the directions in which the wrench will drive and slip. A polygonal opening is located in the wrench. A socket driver is located in this opening with a roller for each polygonal intersection point located between the polygonal opening and the driver. A pair of energizer springs are located between each contiguous pair of rollers and a separator affixed to the selector is located between each pair of springs.
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