Tempering glass, just like tempering steel for sword and knife makers, involves heating the glass up to roughly 1200°F and then quenching, or cooling, it quickly. That process makes the glass several times stronger than it was prior to the tempering process. In other words, you’re more likely going to break your hand than break the window, if you try to punch it out. If your car’s side windows are laminated, you’re in even worse shape in the case of this hypothetical rollover.
Vehicle manufacturers started switching to laminated glass for all of the windows around 2010, and it has become more and more common to see laminated glass on most cars newer than 2018. That isn’t a bad thing, because laminated glass stays in place after being broken and helps prevent people from being ejected during rollovers and other accidents. Laminated glass is also quieter than tempered glass for road noise and passenger comfort. Car and Driver wrote an interesting article on laminated glass using AAA data that is worth a read.
What does all that mean for the Resqme tool? Basically, if your car isn’t brand new, it most likely has tempered side glass windows, and the Resqme tool will very easily shatter them to provide an escape route in an emergency. It does that by using a pressure-activated, spring-loaded metal punch. Just press the tip of the tool against the window, ideally in the corners because those are the weakest points, and apply more than twelve pounds of pressure. Once the spring is activated, the metal tip easily shatters the window instantly. It really is impressive to watch, and I never get tired of showing students how easily it works.