This pendant is simple to make using only a few tools and a couple materials.
Drill & drill bit
Step 1: Another Use for a File Divider
Cut out the strip to a file divider. Use a pair of pliers to bend the end at 90 degrees. Make sure the bend is squarely bent.
Move down the metal strip until you reach your desired length. Bend both ends down at 90 degrees until you have a rectangle. Cut the free end as flush as you can to the pendant.