Sai (weapon)
The sai (釵) is a traditional Okinawan martial arts weapon. The basic form of the weapon is that of a pointed, prong shaped metal baton, with two curved prongs called yoku projecting from the handle. It is generally used in pairs. There are many types of sai with varying prongs for trapping and blocking.
Read more about Sai (weapon): Parts of The Sai, History, Technique