The Sai is a traditional weapon used in the Okinawan martial arts. 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 (tsuka). There are many types of Sai with varying prongs for trapping and blocking.
In martial arts practice, the Sai is typically used in pairs, with one in each hand. The style includes a variety of blocks, parries, strikes, and captures against attackers from all directions and height levels. Use of the point, knuckle and central bar is emphasized, as well as rapid grip changes for multiple strikes and blocks.
The utility of the Sai as a weapon is reflected in its distinctive shape. It is primarily used as a striking weapon for short jabs into the solar plexus, but it also has many defensive techniques.