2-IN-1 SAFETY TOOL: This life-saving multifunctional safety hammer + seat belt cutter is durable and reliable, allowing you to quickly exit your vehicle in an emergency situation. APPLICABLE PEOPLE: This rescue tool has a built-in high-pressure spring. If an emergency occurs, the window can be broken easily with a single push and you can also use it to cut the jammed seatbelt when necessary. Whether it's an elderly person, a woman or a child, it's easy to get started. EASY TO CARRY: This product is only 3.5 inch, you can using velcro to mount it on the center console of vehicles. POWERFUL: Use this Glass Breaker to pop out the CORNERS of side windows, It instantly caused the tempered glass to shatter, safe without hurting hands ADDITIONAL: The hammer provides rapid 1 second window breaking, even under water. The solid Tungsten Steel head as a rock well hardness of 55 and can easily cut metal or glass. A powerful spring mechanism delivers a force of 6 KG to instantly break any window in your car with minimum effort, even under the pressure of water.