This is a simple FO4 Vault tech keychain attachment. It can attach at the top to a normal keychain and be something to grab onto. This is modeled after the 111 vault but could be changed to be any of them. The best layer height for this is .2 or finer, it loses details after that. This can be printed without supports after orientating the print the right direction.
The author marked this model as their own original creation.