【Quality Material】Our measuring ruler tool is made of transparent plastic;It is light, easy to transport;The transparent material allows you to draw without skipping some important numbers or words. 【Multifunctional Parallel Ruler】 Easily draw horizontal and vertical parallel lines, draw circles, curves, arcs and other geometric figures. 【Wide Application】The rolling drawing ruler is suitable for students, teachers, artists, designers and architects to draw and measure various geometric figures. 【Portable】Lightweight, smooth and easy to draw, with a clear scale, the parallel ruler is easy to observe.The parallel ruler is made of high quality PVC plastic with long service life. 【Draw the arc and curve】Insert the pin into the small hole at the end of the ruler to make the center of the circle, insert another pen into another hole and rotate the ruler body 360° todraw a circle.