Lightweight and portable: This car escape tool measures only 3.6 inches, making it compact and lightweight, ideal for storing in your vehicle without taking up space. It can be attached to a keychain for easy carrying. Each safety hammer includes a base with adhesive backing for secure mounting inside your car. Designed for convenience, multiple units can be placed throughout the vehicle. Essential safety tool for automobiles: This underwater safety window breaker and seatbelt cutter helps you and your passengers escape quickly during emergencies. The window breaker functions effectively even underwater,不受水压干扰, providing reliable performance in situations such as vehicle rollovers, electrical failures, fires, floods, submersion, or other unexpected events. Vehicle window breaker: This 2-in-1 safety hammer features a built-in high-pressure spring and a durable tungsten steel tip with a hardness rating of 55. Delivering up to 20KGF of impact force, it instantly shatters side window glass upon contact. Note: The metal tip remains recessed within the tool and only extends upon activation during glass impact. Easy to use for all individuals: Despite its small size, this car window breaker requires minimal effort to operate. A single finger can activate the device, allowing for immediate window breakage in one second. Suitable for adults, children, and seniors, it ensures fast and effective escape during emergencies. Seat belt cutter: Equipped with a concealed sharp stainless steel U-shaped blade, this safety hammer safely cuts through jammed seat belts without risk of accidental injury. To use, simply position the U-shaped blade against the seat belt and push forward to quickly sever the strap.