This brought up some traumatic memories from very long ago.<p>To make a long story short, such a key would have come in fairly handy at some point in my life (only we didn't have 3D printers then).<p>The longer story:<p>In Amsterdam, in the early 70's they were building a subway. This led to all kinds of bad feeling between the people and the municipal government culminating in riots on the 'Nieuwmarkt' where a bunch of houses would have to be torn down.<p>My dad was there when it happened and spotted a police issue pair of handcuffs on the ground after the melee.<p>He picked them up and took them home as a 'souvenir'. A little while later he had to go on a trip and an uncle came to look after us.<p>I found the handcuffs and tried them on my one hand first 'crrrrclick', ok, that was fun. Then - of course - the other arm. I showed my uncle who thought it was funny but told me to take them off.<p>Slight problem, they were on pretty solid, I'd pushed the ratchets as far as they would go. Now panic set in, causing my wrists to swell. My uncle freaked out too, searched everywhere for a key (which wasn't there) and finally had to call the police to get me 'liberated'.<p>They were definitely not pleased and after releasing me took their handcuffs with them and issued a fairly stern warning and had my dad report to the station for another lecture upon his return.