Rolling Ruler Parallel Line Arc Curve Drawing Measuring Roller Ruler with Built In Protractor

[Parallel Line Drawing] The rolling ruler features a roller for easy parallel line drawing, ensuring stability and preventing slippage while you create parallel lines. [Versatile Usage] With a round hole for every centimeter, the drawing ruler allows you to draw circles and ovals, versatile and practical. [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. 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