Vishwa Vajra
When two thunderbolts (Dorjes) are crossed it is called the Vishwa Vajra. Dorje is a Sanskrit word meaning thunderbolt and diamond. The symbolic nature of a diamond – strong with the ability to cut any surface but not be cut itself and the thunderbolt – a powerful and irresistible force of enlightenment. It represents that which cannot be destroyed, but which destroys all evil. In present day this is also used as an instrument of Feng Shui for space clearing. The double thunderbolt holds the four heads representing the Dhyani Bhuddhas of the four directions.