In traditional sai combat, they are carried in pairs, called saitachi. One is used for blocks and trapping weapons, while the other is used for striking, mostly with the knuckle.
- In the 2012 TV series, Raphael's sai are the only weapon out of the four Turtles that is not designed to be a bladed weapon, unlike Leo's katanas, Mikey's kusarigama, and Donnie's naginata.
- In the 2007 film, during the fight scene between Raphael and Leonardo, Raph managed to break Leo's katana blades with his sai.
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