Alvin 312 Rolling Parallel Ruler, 12 Inch
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<b>[Product Information]</b><br>
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<li>High impact plastic</li>
<li>Graduated in both english and metric</li>
<li>Draw horizontal and vertical parallel lines with ease</li>
<li>Includes many useful formulas and conversion factors</li>
<li>Use the built-in protractor to draw angles</li>
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