Thanks so much- excellent info!
Well, when I get back to Europe I guess they'll all be going into the trash then, after I remove the dead lock from my bag :-)
As for using them entering the US I learned the hard way a few years ago... twice.
US customs will cut your baggage pulls... and they say "we don't have access to TSA keys" (uh, ok.. I can buy them on Amazon and TSA is upstairs..)
Both times they destroyed my suitcases.
Anyway thanks. Much appreciated.