The MJK Graphics Adjustable Architect / Sheet Metal Aluminum Scale is an ingeniously simple improvement over the traditional flat and triangular scale. Its unique shape instantly identifies the scale edge.Simply rotate the scale rod to locate the needed scale. Once located, it is retained...ready-to-use, every time you pick it up. All six scales read from left to right and show only one scale at a time to prevent confusion. Fabricated from durable, satin-finish aluminum with smooth, crisp and clean edges, this 12 inch long scale contains graduations of 3/16, 3/8, 1/16, 1/8, 1/4, 1/2, and the scale face is graduated in 32nds. The perfect tool for the Architect or Sheet Metal worker. Made in the USA.