Tonfā (トンファー) is a weapon of Okinawan origin. They are wooden cudgels with handles at the side.
Raphael used tonfā as his training weapon in The Passing. Michaelangelo brandished them in Ninja Turtles: The Next Mutation as his normal weapon due to censorship in Europe which led to his 1987 counterpart not using Nunchaku in the European airings of the 1987 TV Series & the same for his live action movie counterpart as well. Raphael is seen equipping them amongst many other weapons in Showdown, although he never seems to use any of them. The tonfā is also Raphael's primary weapon in Rise of the Teenage Mutant Ninja Turtles.