Conventional safety hammers rely on brute force to break the sides and cannot be used underwater. In addition, this pin type gravity hammer is equipped with tungsten steel nails, which can open the window with a key, and more importantly, it can be used underwater U-shaped design, does not hurt the hand If the car hit to the side or the roof, the seat belts can become tight and difficult to loosen due to their weight; If your car is submerged, the electrical system can short out and prevent you from unlocking the doors or rolling down the windows. This is an option that can help you cut seat belts and break side windows. This tool can be used in the event of an accident and the seat belt cannot be loosened. If the car caught fire in an accident, use tools to hit the windows to escape. If the car rolls into the water, this is a tool to quickly get yourself or someone else out of the way. Fuse machines can also be used to help other stranded drivers. It's worth it Each hammer comes with brackets and straps to hang it in a suitable place.You can place them in the most practical or striking places, for example, such as side windows, door handles, car center consoles, under seats, etc.