This is a Vajra symbol made into a keychain from sandalwood.
Vajra is a Sanskrit equivalent of the Tibetan word Dorje. You can tie this to your mobile or handbag. Vajra is a Tibetan symbol of cosmic energy, the basis of all we can experience with the senses. Vajra in Tibetan means ‘indestructible.’ The Vajra symbolizes a thunderbolt or diamond that destroys all kinds of ignorance. It represents masculine force, sudden inspiration, and the ‘cutting’ of illusion.
Carry the Tibetan Sandalwood Vajra symbol with you all the time for good luck and protection from evils.