Sai are martial melee weapons-
The sai was a dagger-like metal baton or wand with two side prongs or tines curving up and out from the place where the grip met the base of the baton. All three tips of this weapon were blunt. The side prongs may vary in style for different blocking and trapping moves. It was very similar to the jitte, which only had one projecting tine. The average sai was 1 to 1.5 feet (0.3 to 0.46 meters) in length.
Damage: 1D4 + Strength Bludgeoning