Sign up for an Award
Participate with your entry in one of our professional or student awards.Sign up for an award
You are using an outdated browser. Please upgrade your browser to improve your experience.
Nowadays the appearance of thumbtack is nothing special. And there is no protection on the
needles so that people are easily hurt. The design of propelling pencil is inspired by propelling
pencil. It not only can prevent people from getting hurt when they fetch the thumbtacks, it can
also reserve energy, provide conveniences and safety for users.
Shuyu Kuo Tzulin Fu