Humaira Nauticals Solid Brass Proportional Divider Marine Navigation Compass with Wooden Box

Proportional divider in polished brass. 6 inches. Among its multiple functions, the proportional divider can be used to increase or decrease line lengths and circle diameters. It can also be used to inscribe regular polygons within a circle (dividing the circumference of a circle into equal parts). Exquisite drafting tool - very well made.