Helix Circle Ruler

This 2in1 ruler and compass lets you draw circles from 1 to 12 Place the center disk hole on your starting point and choose your desired circle size

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The Helix Ruler

Helix Circle Ruler This dual-purpose ruler also works as a compass, allowing the you to make circles from 1/16 to 12 in diameter. A useful tool for draftsmen, students, artists and crafters who require precise, measured lines. Great for mathematic calculations, technical drawings and designing patterns.

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