This double-headed solid hammer is made of heavy duty carbon steel and plastic. It can save your life in an emergency with just a light tap with the hardened sharp heavy carbon steel tip to break thick door glass, then use the flat end to gradually crack the entire glass. Can be used to cut seat belts. The blade is installed in the safety hook. Hidden blades prevent injury to people. The reflective tape attached to the safety hammer is more obvious. Itcan help you find the lifesaving hammer quickly and save your escape time. This compact car safety hammer is less than 6 inches long and weighs 10 ounces, it can be placed in the car emergency kit and anywhere in the car.