Kryptonite does not provide replacement keys directly through its customer service. However, the company does allow customers to obtain replacement keys for certain products by using the unique key number that is associated with the lock. This key number can typically be found on the original key or on the lock itself. When users need a replacement key, they can check the Kryptonite website for detailed instructions on how to obtain one, as the process may vary depending on the specific lock model. It is important for customers to keep their key number safe to facilitate any future requests. For further assistance or guidance, reviewing the resources available on the Kryptonite website may provide additional information.