I would hope that for security reasons, they would not have specific answers to these questions. I would hope that they would confiscate whatever they felt to be a security issue in a specific situation. My wife had some sewing scissors that were allowed on 3 legs of an international flight. On the 4th leg they were confiscated, but we were told we could pick them up at our final destination. Of course we landed there at 5:00 in the morning to huge immigration lines, and the last thing we wanted to do was to figure out where to go to recover the scissors.