Before carrying my Super Leatherman in my carryon, I asked several X-Ray attendants, and they all said that it is considered to be a "tool" and would be OK. I have carried it on several flights with no questions asked.

Several years ago, I had a rather large pair of sissors in my briefcase, and the X-ray people would not allow it. I forget how they did it but it wound up as checked baggage - which I forgot to pick up when I arrived - oh well!

I would rather that people would err on the side of safety than the other way. Common sense seems to go a long way.

DD