Puppet Technique: Prosthetic Arm Senbon

With this technique, Sasori (inside of his puppet Hiruko) fires his torpedo-shaped left arm towards the enemy. The arm begins to quickly rotate, launching the wooden cylinders that it has attached. The cylinders then open, and each one releases a large amount of needles, creating a quick rain of poisoned needles in all directions.

Trivia

 * The name of this technique was established in Naruto Shippuden: Ultimate Ninja 4, as it was unnamed in both anime and manga.