12″ triangular scale in Staedtler’s student series is ideal for students of architecture. Three sides with six different scales feature die-engraved graduations. Easy-to-read printed graduations will not rub off. Architect triangular scale is open divided: 3/32″, 1/8″, 3/16″, 1/4″, 3/8″, 1/2″, 3/4″, 1″, 1-1/2″, 3″ = 1′. Measurements are fully divided in inches to 16ths. Triangular scale is made of high-impact polystyrene plastic.