This is a very easy thing to make. It is a old bike chain turned into a awesome bracelet. My friend actually threw it at me and I picked it up and turned it into a bracelet.
Step 1: Materials
You will need:
-A bike chain
-Some teflon tape
-Possibly a hacksaw
Step 2: Fitting the Screw
You need the screw to fit through the ends of the bike chain. If need be, hacksaw off the end of the screw so it isn't so long. Unless you are using a nut you will want to hacksaw off the end.
Step 3: Teflon Tape
All you have to do is put one or two layers of teflon tape on the screw to get a good fit. You can always add more or take some off. Because of the stiffness of the chain the bracelet wont come off.
Step 4: Finished
Now you have a very simple, cool bracelet to wear around