Combination architect/engineer scale. Aluminum 6″ combination traditional triangular pocket scale is made from high quality extruded aluminum with ultra smooth edges and is about the size of a ball point pen. Calibrations: A – 16 & (1/8, 1/4), E – 10 & 50, M – 1:100. This handy scale is an accurate and functional tool that will be treasured and used for many years. Combination architect engineer scale, engineering, combo architect engineer ruler, engineer scales, drafting product, architect, engineer. Includes handy pocket clip.