
The magnets are high intensity earth magnets designed specifically for this purpose with more than enough magnetic strength to hold it on your car during impact.
The magnetics were designed for three times the holding capacity by magnetic engineers. An example of the strength is that the DoorDefender® was driven down the highway on a car at 150 kilometres per hours and it was still firmly stuck to the car door (NOTE: DoorDefender® is not meant to be used while driving, this was simply for testing purposes). It was also engineered for a life time of use and is guaranteed not to lose its magnetic strength.
It will not fall off your car guaranteed.
