Window Breaker Keychain Function: It is a safety and emergency escape car tool that can cut the stuck seat belt and break the car tempered glass side window in case of being trapped or the vehicle sinking after a rollover. Originally developed for firstresponders (firefighters, law enforcement agencies), window circuit breakers have become an essential safety solution for all safety-conscious drivers. EASY TO USE: In an emergency, first remove the cover of the window breaker, cut the seat belt, and press the trigger of the striker against the window until it clicks and escapes quickly. Seat Belt Cutter: The key fob design comes in handy to store and hang in your car or bag. Seatbelt Cutter & Glass Breaker Applicable: The mini design of this window breaker makes it perfect for underwater use. Unlike other window punches, it is not disturbed by water pressure. It is also easy to escape from a flooded car using this vehicleescape tool. Window Crusher Material: The car safety hammer head is made of tungsten steel, the blade is made of stainless steel, and the shell is made of abs. The Glass Breaker Seat Belt Cutter is a premium, durable, high-performance product.