12" English Metric Drafting Scale Inches Full & Half Size Metric to 1mm

Alvin 764PM Drafting Scale is four bevel with both metric and customary graduations and is double numbered. It reads left to right and right to left. Graduated: Full size metric cm and mm first edge. Full size inches 50 parts per inch 2nd edge. Half size inch 6"=1' reading to 32nd 0-25 third edge. Full size inches reading to 32nd from 0-12 fourth side. Supplied in vinyl sheath. Sold individually.