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Folding pin / thumbtack

Folding pin

Can to protect hands from pin. It can fold the plastic part. Because it can cover the pin and protect hand from pin. And turned up the plastic parts. Pick the both parts and pick out. It is easy to pull the thumbtacks.
Turned up the plastic parts and make Y type. Pick the both parts and pick out. It is easy to pull the thumbtacks. There is a thumbtack when not in use. To fold in plastic. No longer be hurt your hands.

University

Chungang University

Chungang University
anseong, South Korea

Hyeon-seok KIM,
Chungang University

Yu-bin OH,
Chungang University