【Essential Vehicle Safety】: The vehicle safety escape tool is a wristband type window breaking device.The tool has the ability to break car glass in a limited space.(Please Note：The bracelet window breaker does not work on car windshields. It is effective only against tempered glass commonly used in side windows). 【Premium Material】: The combination of high-elastic band and high-strength tungsten striker bead can offer the full capatiblity to break the window glass under emerghency situation,rescuing yourself. 【Easy Use】: 1.Get the car window breaker bracelet off your wrist 2. Wrap the bracelet tool around your thumb and index finger 3. Place the bead close to the glass and pull it up like a slingshot 4. Release the bead,hit the glass, the glass cracked. 【Safety Tool】: The window breaker bracelet is a low-key escape tool to carry around. It can break the toughened safety glass in a confined space, allowing you to quickly get off the car in an emergency. 【Suitable Gift】: Glass breaker for various vehicles like cars,buses,trucks,race etc.And you can share it with your padres, amigos and maestros as the gift on Father's Day,Mother's Day,Christams Day,Thanksgiving Day cuz this gadget can help you in emergency situations. Note :The bracelet window breaker can't work on car windshields. It is only used against glass in car side windows.