Glass Hammer SpecificationsThis 2-in-1 tool can be used to cut harnesses and safety belts and smash a window to get out of a crashed vehicle very quickly. Mandatory in many racing events it can also be very useful on the road when every second counts and the lives of the occupants are at stake. Remember when a vehicle is caught in the water it is often impossible to open the windows and doors so this tool can be a lifesaver.