Helix Engineers' Scale Rule

by Helix
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The Helix Engineer's and Draughtsman's Ruler is a simple little essential with a professional edge. Calculate dimension and perspective for blue prints and plans without struggling with the guesswork. The rule boasts a wide variety of scales and extensive, multi-purpose guidelines. The ruler is perfect for precision and accuracy. The 30cm ruler goes from scales 1:1 to 1:250.


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