Feature: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 RulerMaterial: PlasticUse: 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