More Details: Each centimeter has a circle hole for drawing circles and ellipses; Clear scale, easy sliding, stable drawing, not easy to skew, clear scale, easy to observe Description: Multiple Uses: Whether you are an artist, student, pattern maker or designer, this measuring rolling ruler is a good helper for your work or study; It can help students develop their own manual skills as well as their imagination Quality Material: Made of transparent plastic; It's light-weighted, easy to carry. Transparent material allows you to draw without ignoring some important figures or words Wide Applications: Versatile measuring ruler, with a protractor to draw the desired figure, can also draw arcs curve, horizontal parallel line, vertical parallel line, enough size for drawing, Weight: 0.08377565956 Pounds, Manufacturer: Zanthicia