Depends on car but it needs to be close.Where do you put that? In the door storage? It might not open if the car is at an odd angle or on the roof. Not in a secure storage and bouncing around the car in a crash, the hammer might kill you?
Tool is very small - if that's a concern your pocket will work.
5 colors Car Auto Mini Safety Glass Window Breaking Hammer Emergency Escape Rescue Tool with Keychain Seat Belt Knife Cutter
Features: 1, Popping whistle for help 2. Cut the seat belt: pull out the escape device quickly from the key chain, then pull out the buckle, align the blade to the seat belt, cut it off quickly, and get out of the emergency 3, The car outside the emergency self-help, the escape device placed in...