C-Thru 360 Protractor
Numbered in both 360° and 90° segments and divided in 1/2°. Cut out center for easy pick-up; packaged in a plastic pouch.
A protractor is a measuring instrument for measuring angles. Most protractors measure angles in degrees (°). Most protractors are divided into 180 equal parts.
They are used for a variety of mechanical and engineering-related applications, but perhaps the most common use is in geometry lessons in schools.