We support the vast majority of key types through our kiosk and mail order options. However, there are still key types we are not able to copy. This could be due to a few reasons. Some high-security key blanks have distribution limited by the manufacturer. Some keys, like circular keys and bike lock keys, are cut in a way that we are not able to replicate. If you want specifics on why your specific key wasn't supported by our service, we encourage you to call us at 855-543-5776, or email email@example.com.