This combined stationary is convenient and practical. It can further improve work efficiency and save the desk space. The design of both pen and ruler is Inspired by the “square body bronze lock in Song dynasty of China”, which makes it the unique half-of-a-water-drop model to be put on table steadily. Original button-style switch is easy to use. Application of aluminum alloy oxidation and sandblast can extend its life and brings fashionable and modern color and texture. With such convenience, you can bring it wherever you go and use it whenever you want.