Beautiful 9" Drafting Tool Scientific Brass & Steel Proportional Divider Replica

Proportional Scale Divider Drawing Tool Professional 9 inch Long Full Brass Brass 9 inch Proportional Divider Steel End Polish FinishStainless Steel Ends For Sharp PointsWith Genuine Leather Cover This is a Reproduction Item, Not Sold As Antique. This detailed item measures approximately 9 inches Point To Point and 3/4 inch wide. 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). Fine piece of drafting equipment-very well made.THANKS FOR WATCHING BY