Help students master geometry with these safety protractors! Our Safe-T branded protractors perform all the functions of a standard protractor without the dangerous points that can sometimes cause accidents. These clear plastic protractors make it easier to draw and measure angles and shapes accurately. They can measure angles up to 360 degrees. Each protractor is ruled in 10-degree graduations through 360 degrees. Protractor measures 4” across. This set includes 24 Four-inch, 360° clear Safe-T Protractors. For over 50 years, hand2mind has encouraged hands-on learning and discovery, driving deeper understanding and helping children unlock their full potential. hand2mind specializes in math manipulatives designed to help students learn by doing. Particularly with learning shapes, hand2mind has you set with geometry sets, compasses for geometry, protractors, rulers and all necessary school supplies. From early math to middle school math, hand2mind has you covered with products designed to enhance learning in the classroom and the world around us. Through hands-on exploration and discovery, we strive to find new ways to encourage students in math practice, literacy activities, STEM education and more!