Review on 🔑 SEMTION Car Safety Tool Keychain - Window Breaker Seatbelt Cutter for Emergency, Pack of 2 (Yellow-Yellow) by Aaron Franklin

The shard of glass works by triggering a spring-loaded pin that retracts instantly. I tested this on the packaging of some screen protectors and on a replacement "9H" tempered glass screen protector I had laying around. On the card packaging: the broken glass has made a small puncture of about 3mm deep, maybe that's enough. break a glass? It is important to note that such a tool only works on tempered glass, not laminated glass. Watching a video of my test on 9H glass at 25% video speed, the glass shattered instantly on impact showing it was probably a window. Glass breaker breaking glass. It takes some force to activate the shard, I recommend testing it on a hard surface that you aren't afraid of scratching so you understand how much force is required. In summary, this tool can work. Falling into a trap is no joke, and it would be nice to add such a tool to your arsenal.