Staedtler drafting machine drawing board Mars Tecnico A3 size ST661-A3
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<b>[Product Information]</b><br>
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<li>A3 size:14.9 x 0.9 x 20.5 inches</li>
<li>Convenient single-hand double locking mechanism for setting at any position on the rail</li>
<li>Color indicator shows whether locked or unlocked</li>
<li>Sheet clamping strips on both sides of the drawing board for fastening of paper</li>
<li>Scale with needle hole for precise compass radius setting</li>
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