One Second Breakthrough: This 2-in-1 safe hammer 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. Along 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 and Portable: This escape tool is only 3.6 inches, lightweight, and powerful. It is easy to carry and can be hung on your keychain or on your vehicle's center console using Velcro tape. You can keep one in the front and one in the rear for added convenience. Widely Used: This glass breaker is suitable for rescue, disaster response, escape, lifesaving, and any 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.