Architectural Scale Ruler, 12 Inch Aluminium Architect Black
Includes scales on three sides: 1-1/2″, 1, 3/4″, 3/8″, 3/16″, 3/32″, 1/2″, 1/4″, 1/8″, 3, 16. The architectural ruler is a great present for engineers to help them in their work. Perfect for office drafting work or school classroom study.