Since its founding in 1953, for almost 60 years, SDI has been guided by the same four principles – Sincerity, Stability, Challenge, and Innovation. These Principles have enabled us to flourish and evolve from a Taiwanese company to an international corporation in the fields of Stationery and Electronic Components. SDI has been famous for manufacturing pencil knives since its founding. Under the brand name “Hand”, SDI gained a nation-wide reputation for quality and innovation. Later, we started to market our products with the SDI brand all over the world and achieved great success with the passing decades.