Chartpak Adjustable Triangular Scale Aluminum Architects Ruler, 12", Silver 

• Versatile design for architects.
• Change units quickly and easily by rotating dial at either end of scale.
• Manufactured of the highest quality aluminum.
• Adjusts to 1/16, 1/8, 1/4, 1/2, 1:1 and 2:1.

Versatile design lets architects work quickly with maximum efficiency. Change units quickly and easily by rotating dial at either end of scale—no need to move the scale from the work surface. 12" measuring length, exact calibrations; 1/32" scale. Manufactured of the highest quality aluminum. Adjusts to 1/16, 1/8, 1/4, 1/2, 1:1 and 2:1.

Includes one triangular scale.