Various Functions: The car window breaker is also designed as a sharp seat belt cutter, so you can cut the seat belt in an emergency. Escape Tools Car: The car escape window breaker is helpful for your self-rescue and allows you to quickly exit the vehicle in an emergency, an indispensable escape tool. Waterproof Design: l The window evacuation tool features an upgraded version and waterproof housing, which makes it difficult to damage and convenient to work underwater. Compact and Portable: You can easily hang the hammer car safety key on the key ring or put it in the handbag or car to help deal with emergencies. Versatile Application: With a built-in high pressure spring design, the window smasher provides the elderly, children and women with the ability to break glass.