No offense, but I'm under the impression that the main purpose behind these is for 'pain compliance'. I can see the application if you work in a job that requires you to legally restrain and control violent people (orderly, cop, etc.), but I find it very hard to believe that people use them in 'self-defense' on any regular basis. If you're getting mugged or violently attacked there are more immediately forceful/less-less-lethal options to resort to, if you're frequently involved in lots of fistfights where you could be putting one to use you probably need to examine your behavior or the places you hang out at, and if you're using a kubaton to joint-lock/hurt the crap out of a drunken guy at a party or the dude who just insulted your mom, that just opens up a whole other can of worms. I mean, I just don't see how one fits into the force continuum between bare fists and lethal force in terms of practicality and reasonable force. People who have driven a tactical pen into a carjacker's eye socket are welcome to correct me, though.