chartpak 238 - adjustable triangular scale aluminum architects ruler 12 silver
versatile design lets architects work with maximum efficiency . change units by rotating dial at either end of scale without moving scale from work surface . 12 measuring length 1 32 scale . exact calibrations . highest quality aluminum . adjusts to 1 16 1 8 1 4 1 2 1 1 and 2 1 . ruler type triangular scales length 12 in standard scale n a metric scale n a.