Helix Drawing Set
Helix HLX17910 – Compact, technical drawing set includes a folding ruler and protector so you can make precise figures and calculations. The 6″ protractor folds out to make a 360-degree protractor. The degrees are numbered every 10 degrees and marked with graduations every five degrees. A magnifier along the base centerline helps you pinpoint where to start your measurement. The 12″ folding ruler features a snap hinge for compact storage. Ruler is numbered every inch and centimeter. Graduations are marked every 1/16″ along one side and every millimeter along the other. Both the protractor and ruler are made of hard-impact plastic..