Print a working ABS security lock keys.
Needs a small magnet which are readily available on the Internet.

http://www.youtube.com/watch?v=fHsWDI6YvJM
http://www.youtube.com/watch?v=fUx3s2AbrfI

Prints standard res on Makerbot Replicator 2.
Obviously use it only to make spares of your own keys.

Updated Feb 2017 for customiser...