The nunchaku (Japanese: ヌンチャク Hepburn: nunchaku, often "nunchuks", "nunchucks", "chainsticks", "chuka sticks" or "karate sticks" in English) is a traditional Okinawan martial arts weapon consisting of two sticks connected at one end by a short chain or rope. The two sections of the weapon are commonly made out of wood, while the link is a cord or a metal chain.

The nunchaku is most widely used in martial arts such as Okinawan kobudō and karate, and is used as a training weapon, since it allows the development of quicker hand movements and improves posture. Nunchaku is now a one of main weapons for practising in many martial art: Karate, Taekwondo, Hapkido, Kung fu, self defence, sport, and police.

Modern-day nunchaku can be made from metal, wood, plastic or fiberglass. Toy and replica versions made of polystyrene foam or plastic are also available. Possession of this weapon is illegal in some countries, except for use in professional martial art schools.

* This app supply a lot information about Nunchaku:
- History, and originning.
- How to make a nunchaku.
- Nunchuck components.

* The main aim is the technique of using Nunchaku:
- How to Block
- How to Strike
- Combination
- Katas
- Performance skills
- ...

Will help user fluent their skill from beginning to advance with a lot of offline videos.