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safety principle:

is mainly the safety hammer conical tip. Due to the contact area of the tip is very small, so when hit the glass with a hammer, the pressure of the contact point on the glass of the considerable, this with the principle of pin have similar, vehicle glass film easily was punctured the and the car glass at the point by a large external force and cracking. Since the middle part of the toughened glass is the most firm, the four corners and edges are the weakest. The best way is with safety hammer beat the edge of the glass and the four corners, especially in the glass at the top edge of the middle place, once the glass has the fissure, knock a few can be launched the whole glass out of the window. Emergency safety hammer broken window is a critical moment as life hammer for the prevention of traffic accidents or by flooding the vehicle can not break the window, and commonly used products charger integrated together to always be on the alert the owner of its existence value, in times of danger immediately thought of and easily can be picked up to help you escape from the danger. To avoid finding a broken window in a crisis.