* High-quality material: The round ruler is made of high-quality thick plastic, which is thick and durable, not easy to break, and lasts longer than ordinary material rulers. * Clear Scale: Each of our round protractors has a very clear scale that's durable and won't fade. You don't have to worry about the ruler scales wearing out and fading after prolonged use. * 16 Sized Circular Templates: This protractor is unique in that it has 16 different sized circular templates. The attached circle template can solve the problem of drawing circles quickly and easily. * Must-Have Measuring Tool: A protractor is an essential angle measuring tool that can solve both study and work problems. For example, the angle problem in the exercise book, or the angle problem that children find in their studies. * Scope of application: The carrier can be used in schools, offices and homes. It is the best choice for surveying, mathematics, painting, technical drawing. Suitable for students, teachers, engineers, designers, etc.