Review on ICANZUO Seatbelt Portable Underwater Emergency by Jason Mitts

At first I was quite skeptical that this would work or not, so I decided to try it on the window of an old truck parked in front of our barn. As you can see it works great. There is a small metal spike that will pop out if you press on it hard. Now remember that you need to apply some force to it and use the tool in the right areas of the window to make it easier to break. It's very light and doesn't mess up my keychain. Highly recommended!