We carry several styles of keychain kits:
 
Standard Keychain Kit (chrome only):
Easy to make on a pen mandrel using our 7mm bushings.
 
Secret Compartment (chrome or gold)
Easy to make using a pen mandrel and our 10mm bushings.  The cap unscrews to revel a secrete compartment to hide your money, notes, or anything else you what to keep secrete.