Intro: Hollow Core Keychain. DIY - Casting Aluminum at Home
I wanted to make some "unique" keychain. It'll have a hollow core and will consist of 2 parts.
Step 1: Casting
Making foam pattern, mold and start casting aluminum
Step 2: Processing
Grinding, drilling, threading, painting...
Step 3: The Bar Keychain Is Ready
The keychain is ready. It can be used to carry spare battery inside or maybe some other tiny things.