This Lock and key set is for the Rhino Vending Classic, All Metal, and Supreme gumball & candy machine models. This barrel lock has an all metal construction that securely fastens onto the center rod of the previously mentioned machines. These lock and keys are used to replace the lock on machines in the event a key is lost or that you have bought a previously owned machine. We have also provided a video on how to drill out your lock. If you have any questions please contact us at 866-648-6225. There are no returns on replacement parts.