best form of defense imo, not illegal to carry and just as good as knuckle dusters, they have come in really handy for me, you clench your fist and have them sticking out between your fingers then punch em in the face, works a treat If the figt is one on one then fight fair, if more or they have a weapon then you want to be able to finish one as quick as possible to stop the next guy hitting ya,
Spoken like a true Physco!