One Second Breakthrough: This 2-in-1 safehammer glass breaker and seat belt cutter is durable and reliable. With just one finger press on the bottom, the breaker can quickly shatter vehicle or interior glass within one second, allowing for a safe escape in case of emergencies. Vehicle Window Breaker: Our car window breaker has a built-in high-pressure spring and a sturdy tungsten steel blade with a hardness of 55. With a 20KGF impact force, it can break solid window glass instantly. Note: Metal tip stays inside the tool – only springs out when breaking glass. Seat Belt Cutter: The seat belt cutter features a built-in stainless steel cutter with a U-shaped hidden knife edge design, ensuring safety and preventing hand injuries. Simply align the U-shaped mouth of the cutter with the seat belt, push it forward swiftly, and exit the vehicle easily and quickly. Fashionable & Portable: This escape tool is only 3.6 inches, lightweight, and powerful. It is easy to carry and can be attached to your keychain or to your vehicle's center console using Velcro tape. Widely Used: This glass breaker is suitable for rescue, disaster response, escape, lifesaving, and unexpected situations. Important Note: Only the tempered glass of the side windows of the car can be broken; laminated glass such as the front and rear windshields and sunroofs cannot be broken.