This protractor is magnetic, which makes it perfect for use on a magnetic whiteboard. Designed for use in front of the classroom, and it comes with a handle for easy positioning. It clearly shows degrees from 0 to 180, but also shows the degrees from 180 to 0, to easily measure angles in both directions. The durable protractor is a great drawing tool for in front of classroom demonstrations. Measures 50cm long.
WARNING: This product contains small magnets. Swallowed magnets can stick together across intestines causing serious infections and death. Seek immediate medical attention if magnet(s) are swallowed or inhaled. Not for children under 3 yrs.