Features 1、[Parallel Line Drawing] The rolling ruler features a roller for easy parallel line drawing, ensuring stability and preventing slippage while you create parallel lines. 2、[Versatile Usage] With a round hole for every centimeter, the drawing ruler allows you to draw circles and ovals, versatile and practical. 3、[Clear Measurements] The measuring rolling ruler is designed with clear scales and various formulas printed on the roller for quick calculations, ensuring accuracy and efficiency. 4、[Lightweight and Portable] Made of transparent plastic, the parallel drawing ruler is lightweight and easy to carry, while its clear material enhances convenience during drawing. 5、[Practical Tool] Whether you are an artist, pattern maker, or designer, the parallel rolling ruler is a practical tool that enhances your workflow. Specification Item Type: Rolling Ruler Material: Plastic Use: Built in protractor for measuring angles; Measurement values on the roller for drawing parallel lines at a fixed distance while sliding on the page; Pencil hole for drawing arcs and circles Package List 1 x Rolling Ruler