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Car Key Cutting Explained Cutting keys for cars is more than just bending a piece metal. It is a sophisticated process that guarantees security, functionality, and longevity of the keys. It is not uncommon to lose your car key or even have it break in the lock. To ensure you're able to always drive your vehicle you'll need a new key cut. Transponder Keys Transponder chips will likely be added to cars that were built within the past 20 years. These microchips are in the key's handle and transmit a signal the onboard compute