MyLifeUNIT Multi-Purpose Drawing Parallel Rolling Ruler, 12 Inch Drawing Design Ruler for Measuring, Drafting

Clear metric parallel multi-purpose drawing rolling ruler, Includes mini protractor at center, Increments in inches and centimeters, Each centimeter has a circle hole for drawing circles and ellipses, Drawing ruler is built in roller, clear scale, easy sliding, stable drawing, not easy to skew, With various formulas on the roller, can be calculated quickly in use, An excellent universal tool for making parallel lines, hatching, circles etc, Wide applications: Versatile measuring ruler, with a protractor is suitable for drawing the desired figure, can also draw arc curve, horizontal parallel line, vertical parallel line, enough size for drawing