What is the symbolism of the Vajra and bell?
Most vajras have five prongs that symbolize the five wisdoms that are attained through the transcendance of five kleshas (greed, anger, delusion, pride and envy). The hub between them signifies emptiness. This one has eight prongs plus the central hub. Vajra is a Sanskrit word, in Tibetan it is called a dorje. It is related to the word for diamond, and appears to be similar to the thunderbolt weapon carried by the Vedic god Indra, and the Olympian Zeus. As a thunderbolt weapon it destroys both internal and external enemies. As a diamond it symbolizes the indestructible and all-penetrating mind of enlightenment.
https://www.khanacademy.org/humanities/art-asia/himalayas/tibet/a/thunderbolt-and-bell
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