【Dimension】-20cm / 7.9-inch Angle Measurement Tools; Material：Plastic; Measuring Angle: 360 degrees; Accuracy: 1 Degrees 【High Quality】- Made of quality transparent plastic, strong and durable, with a smooth surface, not easy to be damaged or broken, and can be applied for a long time. The hollow design allows you to better grasp it, and better read through the angle measurement tool taking information from books or other pages. 【Multifunction】-Angle Measurement Tools are equipped with centimeter or inch units, so that you can measure the length while measuring the angle, you can also use its edge to draw a complete circle or other exquisite curves to meet your needs. 【Wide Application】-Highly craftwork finishes can help you 360 circle measuring, great helper for students learning use.These clear angle measurement tools can be applied for homework, drawing, technical drawing, etc., students, teachers, artists or engineers will need them., Manufacturer: Utoolmart