High quality materials: The circular ruler is made of high-quality thick plastic, which is thick and durable, not easy to break, and can be used longer than ordinary material rulers. Precise angle easy to get: The plastic protractor is made of transparent material, which can clearly read the information on the protractor. Protractor from 0 to 360 degrees, every 10 degrees has a clear scale line. 16 Size Circular Patterns: This protractor is unique in that it has 16 circular templates of different sizes. The additional circular template can solve the problem of drawing a circle, quick and convenient. Essential measuring tool: The protractor is an indispensable angle measuring tool, it can solve learning and working problems. For example, the angle problem in the math workbook or the angle problem encountered by children in their study. Widely Application: The universal circular protractor can be used in homes and offices, students and teachers in schools, suitable for painting, measuring, homework, technical drawing, etc.