Safety pin, but this is actually an safe object? Yes, it is, however is possible to hurt ourselves using it, it wouldn't be the first time that someone was sting at the sharp end of a safety pin, this isn't the purpose of this object, is exactly the opposite, prevent someone to hurt himself at its sharpened tip, this tip can not cease to exist, cause without it, this object loses all its usefulness, and because of that, its was created the mortise of the safety pin, so that made it almost impossible to open it without an intentional gesture, but when opened requires careful.. Nowadays pins are used with double security, the traditional mortise and a second closure that slides to lock any possibility to open unintentionally.
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