A vajra is a weapon used as a ritual object to symbolize both the properties of a diamond (indestructibility) and a thunderbolt (irresistible force), the Sanskrit word has both these meanings. The vajra is essentially a type of club with a ribbed spherical head. The ribs may meet in a ball-shaped top, or they may be separate and end in sharp points with which to stab. The vajra is the weapon of the Indian Vedic rain and thunder-deity Indra, and is used symbolically by the dharma traditions of Buddhism, Jainism and Hinduism, often to represent firmness of spirit and spiritual power. According to the Indian mythology, vajra is considered as one of the most powerful weapons in the universe. The use of the vajra as a symbolic and ritual tool spread from Hindu religion to other parts of Asia.