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This is a thumbtack designed to be used safely and worry free. The pin part is working like telescope. By distinguishing front-to-end and side-to-side design, the thumbtack can avoid unpleasant finger poking while holding it. Thumbtack does not extend its pin while pushing form front-to-end direction, and can only be used by pushing from two sides, by pushing two sides the pin extends out and ready to be used.