Key cutting is the process of creating a duplicate key from an existing one. This is typically done using a specialized machine that shapes a blank key to match the original. Key cutting is commonly performed by locksmiths or at hardware stores, where customers can bring their keys to have copies made for various purposes, such as spare keys for homes or vehicles. The accuracy of key cutting is essential, as even slight differences can prevent a key from functioning properly. There are different types of keys, including house keys, car keys, and padlock keys, each requiring specific techniques and equipment for duplication.