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Types of Car Spare Keys It doesn't matter if dropped your car keys while shopping or if you put it away while you were getting your coffee. Be sure to keep a spare key in your bag and be sure to check the areas you like to leave your keys before leaving. Grocery stores such as Save Mart and H-E-B have self-service key duplication machines that can duplicate house keys, and sometimes car keys and key fobs. Visit their website for the most current prices and other details. Valet Keys Val