Premium Materials: Tungsten steel. We dare not break the 10mm tempered glass, but we hope you will never use it. Quick Use: When you break a window, you must be brave to save yourself. This safety hammer has a sharp tungsten steel hammer tip, which can easily break the window. Hidden steel knife: The seat belt is quickly cut through the built-in safety pliers, which is very sharp. In the event of an accident, the seat belt can be quickly cut through to escape. TPE soft rubber bracket: non-slip, no falling off, good hand feeling, surface with anti-slip line. It is stable, will not take off at a critical moment, and bold blows are safer. Tip: Car glass is a kind of high-strength tempered glass with strong impact resistance. The middle part of the glass is stronger, while the corners are more delicate, so you need to hit the corners of the glass with a safety hammer.