Ideal for educational use, this handy Helix Clear Plastic Protractor lets students measure and mark angles with ease. It's great for geometry classes, as well as graphic design, with a sturdy clear plastic construction that makes it easy to see the paper underneath. The scale is numbered at 10-degree intervals with 1 degree marks up to 180 degrees, giving students precision when drawing or measuring. This bulk pack contains 50 protractors.