1,[Multi-function rolling ruler] Easily draw horizontal and vertical parallel lines. Draw a circle with a maximum diameter of 28 cm. Use the built-in protractor to draw the angle. Draw curves, arcs and other geometric figures. 2,[Paper Ruler] Built-in pressure roller, sliding smoothly, pulling paper stably, not easy to tilt. There are parallel scales, various formulas and conversion factors on the drum for easy viewing at any time. 3,[Transparent scale] The black scale of the scale is clear and easy to observe. Marked in metric and inches. The transparent ruler allows you to draw without ignoring some important graphics or text. 4,[Materials and precautions] Made of impact-resistant plastic, light in weight, easy to carry, practical and durable. 5,Minimalist style: This product, with its simple and minimalist style, is very suitable for those who like low-key fashion Note: Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement.