Flexible 3-in-one tool can be used as a protractor, an adjustable triangle and a ruler. With its magnified protractor calibrations and fixed vertex point, the ProAngle ruler provides extremely accurate variable angle settings. Construct or measure any angle from 0° to 180° in a single step. Ruler folds to an accurate 6" or 15cm rule and opens to a perfect 12" or 30cm ruler.
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