Gun-style working principle: This hammer safety car adopts the gun-style working principle, which can instantly generate a strong impact, feel comfortable and not easy to slip A window break Hammer: Double-sided head with hardened sharp stainless steel points shatters vehicle windows and belts in case of emergency. Safety Cutter: This car safety hammer is fully functional, with a safety cutter, which can cut the stuck seat belt. It does not take up space. This car safety hammer has a compact design and can be placed in a storage box next to the drivers seat or stored in the center console. It does not take up space to prevent emergencies. Easy to use: gun spring, smart chain to break the window, not afraid of water pressure, can easily break the window in water, can be used directly under any circumstances, greatly increasing the chance of escape