The escape tool built-in small hammer can be spring out instantly and break the glass, when you pressed flush against the surface. The window breaker automatically resets itself and holds up well for use again and again.Simply pull the ring pull horizontally to take out the protective cover and use the sharp seatbelt cutter knife to cut the safety seat belt quickly in an emergency.The spring loaded design of this mini car emergency tool makes it not disturbed by water pressure and can be easily used underwater.The safety hammer with bright color, which will make it easy to find in an emergency. This escape hammer is small and lightweight,can be put on your keychain and anywhere in your car.Best presents for all your loved ones.