Flying Thunder God Kunai (飛雷神クナイ, Hiraishin Kunai) are custom-made 3-leaf / 3-sided kunai from the anime series Naruto. They are signature tools of Minato Namikaze, who uses it in conjunction with his Space–Time Ninjutsu: the Flying Thunder God Technique. They differ from a standard kunai in that they have three blades instead of one and the handle serves as the "marker" for Minato's teleportation ability. Their prongs also make them more deadly in melee fighting.
-- From Wikipedia.
The Kunai is 30 cm in length. Stainless steel. Etched handle. Comes with a leather carrying case.