Bust A Cap® for Stingers, Ultra Stingers and Stingers HP If you carry the Stinger, Ultra Stinger, or the Stinger HP, you know the size of these flashlights vary depending on the model. 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. NOTE: 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.