Troika's Patent Keyring was an instant hit three decades ago and is still the most beloved quick release multi ring keychain out there. Manufactured at the original factory out of brass. Besides the classic Troika Patent keychain in mat chrome finish, new finishes and styles are available. Troika patent will last you a long while and spare parts are available. We get a kick out of receiving images of decades old Troika Patent keychains with a rich patina and lived with appearance.