Polished Finish Solid Brass Proportional Divider 6 Inches Among several functions, proportional dividers can be used to increase or decrease lengths of lines and diameters of circles, and can they be used to inscribe regular polygons within circles (dividing the circumference of a circle into equal parts). A fine piece of drafting equipment-very well made
A fine piece of drafting equipment-very well made. The Proportional Divider is not just for architects.
Accuracy depends on person to person and is not guaranteed ( for example if you do not have a short end set at exactly 1 in and a long end set at 3 in you will not have a 3 in to 1 in ratio.