This Phurba is made of bronze and it is made by craftsmen in Nepal. 
The Phurba is a Tibetan dagger used to defeat demons. It was introduced into Tibetan Buddhism by Phadmasambhava and is a symbol of transmutation of negative forces.
 
Signification
Phurba:  meditative practice,  to destroy obstacles of all kinds
Makakala:  Destroy confusion, doubt and ignorance, give energy, remove fear, protection