Starrett 13A Double Square with hardened Blade
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<b>[Product Information]</b><br>
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<li>Perfect small-size tools for checking or setting 90 degree angles</li>
<li>4" double square, accurate and adjustable</li>
<li>Measuring tools have working surfaces ground to a demanding +/- .00001"</li>
<li>All rules are marked with 1/64", 1/32", 1/16", and 1/8" graduations</li>
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