Die-engraved graduations and color-coded grooves make this piece a must-have tool. White plastic construction. *Ideal for professional and student architects *White, solid plastic *Die-engraved graduations *Color-coded grooves *12" tri-scale *3/32, 3/16, 1/8, 1/4, 3/8, 1/2, 3/4, 1-1/2, 3, 16. An architect's scale is a specialized ruler designed to facilitate the drafting and measuring of architectural drawings, such as floor plans and orthographic projections.