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