Inspired by the modern steel structures and leveraging the lightweight,  compactness, and strength of aluminum alloys, this unique design of  a triangular prism with a smoked bamboo latch serves as a penholder  (with the magnetic force at work) and a ruler for horizontal measurements.  
One 3 is achieved with the one geometric shape in its utmost purity  and the precisive integration of three professional functions. This pen  ruler can accommodate requirements in different use cases, with an  easy switch between six ratio scales through the reversal of the triangle, so that you can measure and express your ideas anytime.
Design and made in Taiwan.