Perrin Number 5 ScorpionPerrin Number 5 Scorpion (no box) The No. 5 is a popular design worldwide. Created in the nineties by the French knife maker and combat specialist Fred Perrin, this compact personal protection tool, in its original format, is often carried as a neck knife. The knife is built around a single index finger hole, serving a few combat driven functions such as being able to not lose the knife if for some reason the user must open his hands. Also, the hole