We were lucky to find these Katsuro throwing spikes. These ancient designed throwing weapons were adapted by assassin monks from ancupuncture needles.  They are designed to be used as a puncture weapon, usually from behind and they can also be thrown. 

This set contains three of these ancient designed spikes.  Each spike has a hard teflon black coating and 440 sturdy stainless steel. Each set comes with a nylon wrist or ankle sheath.