Fifteen inch length. Inscribed with full 180 degree protractor markings. The middle of the bottom edge forms the protractor center when the arms are closed. This tool provides the essential features of a protractor plotter and a basic parallel ruler. Allows courses to be measured from a convenient meridian. Made of extra strong, crystal clear acrylic.
0.22 inch thickness, brushed aluminum rigid metal arms and handles.
SHOWN AS THIRD FROM TOP ITEM IN IMAGE.