Step 1: What you'll need to get started
2. A 3/8-16 Carrige Bolt 12" long
3. A drill
4. Any washers, nuts, fasteners your heart desires
(so long as they fit the bolt)
5.Some string or wire
6. A keychain clip
Note: These are merely the materials I had to work with, feel free to experiment with whatever materials you may have.