12" Rolling Parallel Ruler

This handy mapping and drawing tool is ideal for helping you draw horizontal and vertical lines as well as circles and angles.  The ruler is 12" (30cm) long, and is graduated in 1/16" (1mm) increments with a pencil hole every 1/2" (1cm).  The protractor is graduated in 5 degree increments from 0 to 180 degrees.  The roller is graduated in 1/32" (1mm) increments and includes various formulas and conversions.  Dimensions: 13" x 2-1/2" x 3/4".  Shipping weight 1 lb.  Made in Taiwan.