Unlike ordinary tactical lights with crenellated bezel that can often inflict unnecessary injury, Pentagon Light’s K2 Porcupine light features sharpened spikes around the bezel that protrude outward only when the spike protector is lowered. With the spikes protected when not needed, the fast turn threading allows the rapid retraction of the spike protector. These spikes are sharpened more than ordinary crenellated bezel lights. Together with its 70-lumen white light, the sharpened retractable spikes make K2 a powerful self defense tool.