I accidently took my nail clipper set onboard, well almost did. At the X-ray to go onboard they opened my bag. Within my nail clipper set was a small knife with a 1/2" blade (blunt end). The clippers were OK, the 1/2" blade with the dull point was not. They gave me the option to go ahead and give it to them, mail it home, put it in a locker, or have them place it on with luggage. I did the latter.