Hello everyone, This is a post in response to commenters requesting to see video evidence of a Kunai that I've designed. Its main feature is that it flies straight and does not rotate through the air like the average throwing knife. Instead, this one permanently has its blade pointed directly toward the target during its entire flight. A decent analogy to its flight would be an arrow or a football. You can find the video through the YouTube link below or simply type in Spiral Flight Kunai into the YouTube Search Bar. As a side note, the design may seem pretty simple. However, it took three different prototypes to narrow down the perfect placement of its center of mass and pressure to make it stable in flight.