Car Safety Hammer Car Window Glass Breaker Alloy Body Hidden Seat Belt Cutter 2 in 1 Emergency Rescue Life-Saving Urgent Tools Quick guide to broken windows A safety hammer on the car can save lives in times of crisis, and its very important of placement Recommended location Door character /Central hand storage box /Co-pilot glove box car with explosion-proof film The broken glass will stick to the explosion-proof membrane, so please knock along the edge of the explosion-proof membrane and don't hit the middle position Knock on the corners of the glass Automobile glass is a kind of high-strength tempered glass with strong resistance to blows. The middle of the glass is stronger and the edges are often fragile, so be sure to knock the edges of the glass with a safety hammer.