I am traveling to South America and want to be sure that my pliers
are not confiscated when I pass thru security.
I’ve had a small needlenose plier along with things in my toilet
kit, and it never caused problems. Longer sharper things like files,
that would make better weapons, or hammers, etc, might be
confiscated. But there’s a simple answer. You can put all the tools
you want, short of things with fuel gasses in them, in your checked
luggage. The problems are only with carryon luggage. A checked bag
would be fine.