Bolt Pills/Secrets case

thingiverse

This thing can keep your keys together and also can be used to carry your daily pills, micro-films, secret sd cards etc. The thing is a bolt-nut assembly. The bolt is a sub-assembly of a bolt head and a hollow bolt body that is held together by a reversed (left-handed) thread. To open: Screw the nut all the way up until the bolt head is released. Get the key ring from your nearest dollar store.