Sturdy and DurableMade of PVC, it is sturdy and durable, not easy to break, and the surface is smooth, but it won't slip from your hand when you hold it. The edges are rounded, won't scratch your hands and can be used for a long time.Clear scaleTransparent design and clear scale allow you to identify it easily and quickly, without obstructing your view and easy to use. After use, it can be placed in the matching zipper bag, and the zipper bag can also be used to store stationery, notebooks, etc.360 The two rulers are combined into one, which can be rotated 360 when opened, which can meet your daily measuring and painting needs, and provide a good helper for your work.< p>Widely UsedIt can be used for various angle measurements, such as elbow joint, knee joint or spine measurement, etc. It can also be used for architects, artists, designers, teachers, engineers, students and other people who need to draw, the instruments can bring them convenience.