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Different Types of Key Cuts For Cars If you're having your keys cut or replacing keys that have been lost you'll want the highest quality you can get. You want to make sure that the key fits perfectly into the lock and that it starts your vehicle without any problems. Traditional keys have cuts on their edges, which align with pin patterns found in the locks that allow them to open. The most advanced keys are laser-cut and have a number of security advantages. Sidewinder Keys Sidewinder keys, also called internal cut keys