This is a sai used in Ryukyu Kobudo. Made of iron and hardened by heat treatment, it is built to be sturdy. New Original Sai (Sai) Iron Black rust finish, red Japanese pattern string wrapping One set (2 pieces) Ryukyu Kobudo Comes with a case. This sai was modeled after the ones used by a finalist in the Ryukyu Kobudo World Tournament by a swordsmith. It has an exquisite balance that feels like it sticks to your hand, better than commercially available ones. As it is handmade by craftsmen, there may be some imperfections when looking closely, but we hope that those who understand this will consider purchasing it. This is a valuable set from a limited production run. Not commercially available! It has appeared in the world for the first time! It has a rare value that those in the know will understand. *Regarding maintenance As it is prone to rust, it is recommended to apply a thin layer of oil after use. No claims, no returns.