The circle protractor is made of plastic. with clear scale, durable in use. Easy to useYou can use the 360-degree Protractor to get the angle and length quickly, convenient to use, easy to read. Easy To CarryMath Protractor which is Small size, light weight, easy to store, that you can take it in your pocket or pencil case. 360-degree protractor360-degree circle protractor, with rotating swing arm , easy to measure and draw angles, excellent math learning tool. ApplicationThe geometrical protractor isthe common shape protractor, Suitable for school learning, also great maths tools for office school supplies, it is also suitable for architects, carpenters, students, teachers, engineers. Specification Material: plastic Size: 13 x 13 cm Color:as shown in picture Product Name:360 Degree Protractor Feature: This full circle protractor is made from acrylic for a sturdy but beautiful protractor. Protractors are fun and easy to use, and it's a convenient way to teach and draw about angles. The circular protractor is a necessary study tool when kids are doing homework. 360-degree protractors, which are small in size and can be carried around in pencil cases, pockets, school bags, etc.