Shatter resistant plastic protractor has rounded corners and tapered edges. Slotted separation eliminates confusion of supplementary angles and is perfect for artists, students, designers and all craftsmen. It`s actually two protractors in one, with the lower scale reading right-opening angles [<], while the upper scale reading left-opening angles [>]. Scales are 6" for the outer edge and 10 cm. for the inside edge. Protractor is orange, so it won`t get lost on your desk. Degree Graduations: N/A; Material(s