High Quality MaterialThese circle protractor rulers made of high quality material, sturdy and durable, not easy to break, can be used for a long time, are an ideal choice for learning tools. Practical DesignThe protractor ruler with arm with transparent design, beautiful and simple, numbers and letters can be seen on the page through the protractor, which is easy to use. Practical DesignThe protractor ruler with arm with transparent design, beautiful and simple, numbers and letters can be seen on the page through the protractor, which is easy to use. ApplicationThis set of protractor rulers is suitable for classrooms, offices, engineering and other occasions. They are ideal tools for children to learn mathematics. They can be stored in school bags, pencil bags, document bags, etc. Measuring range: 0-360 degrees Color: as picture show Size: as picture show Package included: 2 * Circle Protractor Ruler