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This safety hammer itself fixed bus or train window in the upper right corner. In the event of an emergency requiring emergency escape after people removed the secure shell, just pull up handle hard, and let it go,using the inertia to break the glass, then you can emergency escape.
This product is not as in the past because the vehicle accident product is not found in time, or is difficult to remove, inconvenient to use. But this safety hammer is easy to use, fast and effective. It can help people emergency quickly fled in time.