ACU-ARC® Adjustable Ruler A ruler that eliminates the need for a beam compass or expensive curve sets. It can be adjusted to any radius, from 6 3/8" to 200" (17cm to 500cm), to determine the radius of an existing curve for dimension drawings, to find center lines and center points, or determine what a curve must be to fair in existing points, or lines, on a drawing. - A464 = Adjustable Ruler in Inches
- A464M= Adjustable Ruler (Metric)
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