Starrett C19 Chrome Protractor
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<b>[Product Information]</b><br>
<ul>
<li>Double graduations from 0-180 degree in opposite directions permitting the direct reading of angles and supplementary angles</li>
<li>The back of the tool is flat for ease of use</li>
<li>The blade can be locked firmly at any angle by the lock nut</li>
<li>Satin chrome finish for ease of reading and resistance to rust</li>
<li>Double graduations from 0 - 180 degrees in opposite directions permitting  the direct reading of angles and supplementary angles</li>
<li>The back of the tool is flat for ease of use</li>
<li>The blade can be locked firmly at any angle by the lock nut</li>
<li>Satin chrome finish for ease of reading and resistance to rust</li>
</ul>
</div>
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<img src='http://ecx.images-amazon.com/images/I/21VUPp44xML.jpg'></br>