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 side window glass within one second, allowing for a safe escape in emergencies. Vehicle Window Breaker: The car window breaker features a built-in high-pressure spring and a sturdy tungsten steel tip with a hardness of 55. Combined with 20KGF impact force, it can break solid tempered glass instantly. Note: Metal tip remains inside the tool and only extends upon activation during glass breaking. Seat Belt Cutter: The seat belt cutter includes a built-in stainless steel blade with a U-shaped hidden edge design, enhancing safety and reducing the risk of hand injuries. Simply align the U-shaped opening with the seat belt and push forward swiftly to cut through it for quick escape. Fashionable & Portable: This escape tool measures only 3.6 inches, lightweight and compact, making it easy to carry. It can be attached to a keychain or secured to a vehicle’s center console using the included Velcro tape. Ideal for keeping one in the front and one in the rear of the vehicle. Widely Used: Suitable for emergency rescue, disaster response, personal escape, lifesaving, and unexpected situations. Important Note: Designed to break only tempered glass, such as car side windows. Laminated glass, including front and rear windshields and sunroofs, cannot be broken with this tool.