Alvin Professional Parallel Glider 14 inch
This 14 inch parallel glider is a versitile timesaver for drawing, drafting and nautical applications. It combines the functions of a parallel straightedge, triangle, protractor, T-Square, and compass. It has a durable acrylic blade with printed graduations, through holes at 1/2in increments, and a comfortable aluminum roller bar with rubber o-rings.