Throwing knives are commonly made of steel with wooden or plastic handles but many throwing knives have knit wrap for the firm grip of knives. Some throwing knives are also known as Kunai knife, it is a Japanese tool which is mainly used in martial arts. If mastered a kunai knife could be used as a multi functional weapon. It was originally used by gardeners for plantation or other purposes. It has blades on both sides but only tip is sharpened.