A "Kunai" is a traditional Japanese throwing knife that typically has a straight, double-edged blade with a pointed tip. It is commonly associated with ninjas and is known for its versatility as both a weapon and a tool. The kunai is often depicted with a ring on the pommel, which can be used for various purposes such as attaching ropes or securing the knife to the body. Its compact size and balanced weight make it ideal for close-quarters combat and precise throwing.