If you carry a full size flashlight, like the Streamlight 20X, the
cap alone will not break glass. There is no way you
can break a window with these flashlights without causing damage to
your expensive light or injuring someone from flying glass. Attaching
Bust A Cap® to your flashlight will insure that it will break glass
with just one tap and not damage your equipment.
This cap is
unique to the Streamlight 20X because it has a spring that you must
remove from the old cap and put on your new Bust A Cap.
Please remove the o-rings from the old cap and put on your new Bust a
cap to insure that your light remains water tight.