I have used several different types of shards so I hope I can give you some insight into this particular one. If you don't get a bad block, most windows should break, but not necessarily on the first try. It also depends on where you place the device. The smallest corner of a window is the most efficient place to use broken glass. To check that the block is actually ejecting the shards (i.e. not defective), pull on this part with your fingers while keeping them out of the way. from a hole. If the conical tip pops out forcefully, then it's working. Now some people might think it's buggy because it doesn't break every window every time. Not sure if there is a glass breaker that breaks all the windows in one hit every time. If the glass doesn't break the first time, don't assume nothing happened. The structure of the window has been weakened, but not enough to break. From here you should keep hitting resqme in the same place in the window. Most tempered windows break on the second or third impact. *WARNING* Be careful not to press too hard as your hand may fly out the window and cut itself on the glass. Practice using the tool on other hard surfaces and you'll see the small dent left by the shard. Try to press hard enough to activate the spring, but then stop pressing. This should keep your hand from flying out the window. I have already mentioned that there are many other broken glasses. Spring loaded centralizers like Fire Hooks Unlimited work pretty well (better than resqme) because the spring is stronger. But with them you have to press so hard that your hand often flies out the window. The best ones in my opinion are those from Zak Tools. With this device, you retract a spring and then release it, along with a weight that hits the conical tip, applying so much pressure to a tiny point. The best thing about this type of shard is that you can control the force of the impact. If you pull the spring as far as it will go, the force will far exceed the force provided by resqme and will shatter almost any window in one fell swoop. And since you're not pushing through the window, there's no chance of your hand flying out and getting ripped by the glass. There are also gadgets like the Lifehammer - I haven't used them so can't comment on them, but they look a little sketchy. When it comes to convenience, nothing beats resqme. The design is brilliant. You can leave it on your keychain, tug to detach it from the mount, and you're good to go. It is also the most compact type of shard. Since most people rarely, if ever, need to use such a device, a handy, small shard of glass is probably preferable to larger, more powerful ones. For professionals (firefighters, EMTs, etc.) I'd look for a more powerful tool like some of the ones I mentioned and get a separate seat belt cutting tool (like the one from Fire Hooks Unlimited) that you can don. on the same keychain. ResQMe Tip: This tool could be perfect with a few tweaks. First, if it had a stronger spring, requiring say more than 20 pounds of force to actuate, it would be far less likely to fail. I understand some people (kids or seniors) might have issues with this, but the new device might be called "ResQMe Pro" or something and you're still promoting the original. The second improvement will be a harder tip, such as B. tungsten carbide. These improvements will no doubt increase, maybe even double, the cost of the device, but it's well worth it for a compact, handy, life-saving glass breaker that works every time without wearing out after repeated use to make it more durable. Tool for professionals.
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