Alvin Scholastic Triangular Scales

Architectural — 12" scale with plastic center core offering open divided graduations 3", 1-1/2", 1", 3/4", 1/2", 3/8", 1/4", 3/16", 1/8", and 3/32" to the foot and a scale divided 16 parts to the inch.

Engineering — 12" triangular plastic scale. Fully divided graduations of 10, 20, 30, 40, 50,and 60 decimal parts to the inch.