| 摘要 |
A wrench selector provides for the quick and accurate checking of the dimension of a nut or bolt across the flats thereof, in order to determine the corresponding size of the wrench or socket required for use therewith. The selector incorporates two jaws, with the first jaw extending from an elongated scale and the opposite jaw extending from a body sleeve through which the scale slides. The scale includes several rows of dimensional numbers thereon, with each of the numbers corresponding to a distance between the two jaws. The numbers are staggered diagonally across the face of the scale, in order to spread them for greater legibility. The body or sleeve includes a set of windows spaced laterally thereacross, which in combination with the diagonal array of dimensional numbers, results in only a single one of the dimensional numbers being exactly aligned within a corresponding one of the windows for any measurement. The scale numbers correspond with the standard sizes of nuts and bolts used in industry, and the selector may include inch and fractional inch measurements on one side and metric measurements on the opposite side. The selector may be formed of various durable or disposable materials as desired, and may be made sufficiently small so as to fit within a conventional shirt pocket, in order to be readily available to the user at all times.
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