Vehicle component of life-saving emergency hammer auto supplies

Is the news, driving a car fell into a roadside River, killing 5 men inside. If there was a life-saving hammer, just for one, wouldn't be killing 5 people!

Because once the car fell into the water, under the strong pressure of water outside the car, the man in the car was under no circumstances open the door push. After a few minutes, even if the oxygen in the car is not completely out, break through flood water in an instant will make passengers faced extinction. Life hammer if there is a handle, you can cut the seat belt, smashed car Windows and escape from the inside. So there is life-saving hammer, there is much hope of escape!!