Omega Roll n Draw Ruler (1936) (16 Cms)

 Omega Roll-n-Draw Ruler is a multipurpose drawing instrument that lets you measure in centimetres 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, and designers.