In Tibetan ritual, the Dorje (vajra) is often used together with a bell (ghanta). The vajra is held in the left hand and represents the male principle—upaya, referring to action or means. The bell is held in the right hand and represents the female principle—prajna, or wisdom.
At the center of the vajra is a small flattened sphere which is said to represent the underlying nature of the universe. It is sealed by the syllable hum (hung), representing freedom from karma, conceptual thought, and the groundlessness of all dharmas. Outward from the sphere there are three rings on each side, which symbolize the three-fold bliss of Buddha nature. The next symbol found on the vajra as we progress outward are two lotus flowers, representing Samsara (the endless cycle of suffering) and Nirvana (release from Samsara). The outer prongs emerge from symbols of Makaras, sea monsters.