Modern cars are safer than ever. Apart from multiple technologies that protect you in the event of a crash, they also have features that can help avoid getting into trouble in the first place.

Then again, there’s no such thing as perfect safety. One of the worst fates is to survive a car accident, but then be trapped inside your vehicle. One particularly scary occurrence is when your car goes into a body of water and you can’t get the window open to escape.

That’s where this little beauty comes in. It’s a small tool you keep in your car that can quickly smash a window. So even if something prevents the door or window from opening, you can still escape.

That’s not all you can do with this little life saver. It has an integrated razor sharp enough to quickly cut through your seatbelt. So you can free yourself and any other passengers in the vehicle. Even if the belt releases have failed.

You also get a mount, which the maker claims won’t let the hammer go in a collision, but still makes it easy to remove. Most people are probably just going to put this in their glove compartments.

You get two hammers for the price, which works out to single digit dollars on a per-hammer basis. That’s a pretty small price for some peace of mind, and makes it easy to give one away.