3-in-1 Function: This safety car window hammer has a flat head hammer, a tungsten steel head, and a hidden blade, just one product combines the functions of all three tools into one to help you escape as quickly as possible in the event of an emergency.Premium Material: We use high quality zinc alloy, aluminum alloy and tungsten steel in the best ratio to make this safety car window breaker, which makes it very sharp and hard. The properties of this material also make it rustproof and can last for a very long time.Fireproof & Waterproof: Both underwater and fire environments do not affect the normal use of our window hammers at all. The sturdy and heavy hammer can help you quickly cut the seat belt to escape underwater and break the window quickly in high temperature.Anti-Slip Design: The handle part adopts a diamond-shaped concave-convex design, increasing the friction between hands, which is more in line with the requirements of hand gripping. It is more stable when using and you don't have to worry about it slipping off.Using Instruction: If you need to cut the harness, use the cutter hidden on the side of the handle. If you need to crack a car window, use the tip of a tungsten steel hammer to strike the corners of the glass, which are more fragile, so that the glass is more likely to break.