Why put car keys in aluminum foil?

In the presence of guards and CCTV cameras, criminals will think twice before taking your car.

Equip your car with an anti-theft alarm and a steering lock: What’s more annoying for a thief than being noticed committing a crime. The presence of a car alarm will therefore only deter him from stealing your car; especially if it is also equipped with a steering lock which will prevent it from maneuvering the vehicle.