Alvin Rolling Parallel Rulers

Rolling parallel rulers are multipurpose drawing instruments that let you measure in inches and centimeters and draw quadrants, squares, circles, angles, crosshatching, and vertical and horizontal parallel lines, quickly and easily. Functions as a compass, horizontal ruler, straightedge, protractor, circle template and angle template, all in one. Unique compass pivot button eliminates surface marking. Ideal for artists, students, pattern-makers, quilters, and designers. Includes instructions. Available in 6" or 12", Alvin rolling parallel rulers.