The safety hammer is a new mini multi-purpose emergency tool. The size of the ordinary safety hammer is the same as the car keys and it is the best choice to replace the existing bulky life-saving. At the same time, the multi functional safety hammer can be available in a variety of colors and suitable for all car owners. This kind of the multi-function safety hammer for sale has the function of cutting safety belt, smashing windows and other functions. So the safety hammer is very suitable for underwater escape, and just hit the firing pin of the life-saving device on the window glass and press it to trigger the firing pin to crush the glass. For safety concerned, it is necessary to prepare such a safety hammer with multi functions in your car.