Alvin 610A pocket size architect's scale ruler. High-quality 6" triangular architect drafting scale is made from high-impact plastic with white, non-reflecting dull-matte faces and tapered edges. Color-coded furrows and printed graduations in 3/32, 3/16, 1/8, 1/4, 1/2, 1, 3/8, 3/4, 1-1/2, 3 inches to the foot; one edge to 16ths. Made in Germany. Alvin 610A architectural drawing scale includes plastic storage sleeve. Compact size is great for travel and on-the-job field use.