This is a custom-designed balisong, commonly known as a butterfly knife. The defining characteristic of this weapon is the fan-like opening of a freely pivoting blade, allowing rapid deployment or concealment. As a result, butterfly knives are outlawed in many countries. It has been painted by airbrushing transparent paints that fade together over a chrome base coat. This isn't just a weapon, it's a conversation piece - Imogen, Arms Dealer In Training.