The necessity of using a metal safety hammer: - This sturdy all-metal rescue hammer allows you to escape from danger in less than a second, even under water or fire. We have seen too many tragedies in the news. So for you and your beloved family members, please prepare a safety hammer for each car just in case. And we hope you will never use it in your life. Great Power Safety Hammer: High hardness tungsten steel hammer tip hard and sharp, can immediately break the window, with a hidden sharp knife that can quickly cut the seat belt. Seat Belt Cutter: A seat belt cutter window breaker is built into the lower end of the handle of each hammer. It is built in such a way that you can't accidentally cut yourself, while still being easy to use in an emergency. The razor-sharp stainless steel seat belt cutter makes it easy to cut the seat belt. Car Safety Hammer Principle: The life-saving hammer is conical. When the glass is hit with a hammer, so the car window is greatly affected at this time. The external force causes a slight crack. a small crack means that the internal stress distribution of the whole glass is destroyed, this time, just use it gently. The glass shards can be removed by hitting the hammer a few more times. Knock around the glass with a sharp tip: The middle part of the tempered glass is firm and the edges and corners are weak. A good way is to hit the edges and corners of the glass with a hammer, especially in the middle of the upper edge of the glass. Once the glass cracks, you can hit a few more times. Product information: Product name: : car safety hammer Product color: : black Product size: : about 230*88*38mm Product material: : ABS, 45 carbon steel Product net weight: : about 225g Product gross weight: : about 238g with color box Product packaging: : ABS, acier au carbone 45 Poids net produit: : environ 225g Poids brut du produit: : environ 238g avec bote de couleur Emballage du produit: : 1pcs / color box Suitable models: : universal type Delivery quantity: 1 pieces