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's grooves and notches. Key cutting is commonly performed at hardware stores, locksmiths, and some retail outlets. The accuracy of key cutting is essential for the duplicate to work properly in locks. If the cut is too deep or shallow, the new key may not fit or operate smoothly. Many types of keys can be cut, including house keys, car keys, and padlock keys, each requiring specific techniques and equipment.