Triangular scale is etched with Imperial scale graduations for architectural use so users can work with the dimensions of reduced-scale drawings, measuring them directly in feet and inches. Graduations include 3/32, 1/8, 3/16, 1/4, 3/8, 1/2, 3/4, 1, 1-1/2, 3:1 and 16. Scale features a color-coded center groove for easy identification. Carry the triangular scale in the included protective plastic case.