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Laser Cut Key For Cars As a way to combat theft, keys for cars now include improved locking mechanisms to prevent theft. The majority of modern vehicles use laser cut or transponder keys that must be programmed to be compatible with the car's system. The edges of traditional cut keys are straight, making it easy for locksmiths and thieves to duplicate them. Mechanical Keys The mechanical key is a basic physical device that connects to the lock cylinders in a car's