Ford, Lincoln, Mazda, & Mercury Simple Key Remote & Key Combo with Trunk Button. Simple Key is a new way for consumers to easily replace modern car keys. The consumer-friendly kit includes a Keyless Entry Remote Key and EZ Installer. The key blade can be cut at most hardware stores, car dealers, or automotive locksmiths. Then, the EZ Installer is used to pair the key to the vehicle in just a few minutes. Works just like your OEM key. Avoid the hassle and expense of having togo to the dealership for pairing. The EZ Installer is a single vehicle use pairing tool. Once you use it on your vehicle, it cannot be used on another.