USSR Missile/Rocket Launch Key

This model is based off of these photographs: http://englishrussia.com/index.php/2009/04/13/rocket-key/
These keys were used in the safety interlock system of Soviet nuclear missiles and rockets (Vostock, etc.). It's about actual size and properly proportioned. The original goal was to make a key-chain, however the only way to get the key ring onto the key is during the printing process.