Koala Tools Ring Ruler 360

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Ring Ruler 360 - Circle Ruler showing arc length, diameter and degrees
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Ideal for artists, architects, engineers, educators, craftspeople, woodworkers, quilters, and pattern makers, the Koala Tools Ring Ruler 360 is the first size-adjustable , circular ruler. It makes drawing and measuring circles and arcs a much simpler and more efficient experience by eliminating the...
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