From the Rusty Knuckles Blog:
Ol' Stevie Tombstone came up with the idea that he needed a new version of the luck rabbit's foot keychain, that was huge in the 70's and 80's. We decided to create a keychain out of aluminum blanks that are soda etched by TWT Motorcycle Parts and then are cut down and finished. Each keychain is cut by hand from aluminum plate and then sprayed with high temperature paint to help bring out the etched logo. The surface is sanded down and a hole is drilled for the key ring to be inserted.