Ninja tools

What is a Kunai?
Kunai along with the shuriken, is one of the most common ninja tools. It is a black dagger with a handle wrapped in bandages and a small ring attached to the end of it. The kunai is designed for thrusting and stabbing, though it can still do some damage if thrown despite not being designed for it, and is about the length of one's hand.

How do you use a Kunai?
A Kunai is not meant to be thrown however it can be thrown and attached with explosive tags and other things. A kunai is normally like a dagger and can be used for blocking attacks if fast enough. ((skip to 00:42 to see ways to hold if throwing kunai))

What is a Shuriken?
Like kunai, are one of the more basic weapons seen in Naruto series. They are sharpened, four-pronged metal stars, useful for throwing. They can also be used for close combat, but not very efficiently. Although small, they can be used to distract, pin down enemy shinobi, or if accurate enough, can kill or incapacitate an enemy.

How do you use a Shuriken?
Shuriken is used for throwing mainly, A light tensing of the fingers and wrist at the moment of release will create the proper feel for a straight and accurate throw. Work on developing the feeling that the blade seems to slip out of your hand by itself, rather than the feeling of flinging or slamming the shuriken into the target with the muscles of the arm. By allowing the blade to slip from your grasp at just the right instant, you cause the blade to cut through the air with the proper trajectory. ((skip to 00:42 for more info on throwing shuriken))

What is a Senbon?
Metal needles with a point at both ends. They often serve a medical purpose, being used to strike acupuncture points. They have little killing power, but can be thrown with great accuracy. A user with proper medical knowledge however, can effectively use senbon in battle to incapacitate or even kill their target should they aim for vital spots.

Tips on using Senbon
An added benefit of throwing these at the enemy is that these are smaller than a kunai or ashuriken, making it harder to see and dodge.