For all you shady types,3d printed keys for handcuffs

jdolecki

Print your own handcuffs keys

http://www.slate.com/blogs/future_tense/2012/07/16/_3_d_printed_handcuff_keys_hacker_highlights_security_problem_for_police.html

Gadgetman

Well, this shady type has an actual metal key for handcuffs...
(Won it at the "Lockpicking Village" during HackCon one year.)

Not that you really need one, handcuffs have just about the easiest locks to pick.
(You can probably do it with a toothpick if you can just reach it... )