Most Dangerous Folding Fan? (Huge Pocket Shuriken)

We love Kunai knives here at The Slingshot Channel. But they have two main drawbacks: Not enough mass to penetrate deeply, and it is hard to make them stick from any distance. Shurikens solve those issues (at least the heavy types), but those are not pocketable really - plus they are illegal in many countries. So we designed a folding Shuriken, consisting of four small Kunais. These knives rotate around a steel base. In folded condition, the weapon uses little more pocket space than a normal Kunai, but