Can be used as a pendant, or can be used as a hanger on the bag, mala, etc.  It's 3 faces or head of wrathful deities represent the destruction of hatred, delusion, and greed. The triple bladed phurba or ritual dagger symbolizes the powerful Buddha-activity of the wrathful deity Vajrakilaya, whose meditational practice is effective for annihilating all obstructions. The 3 blades represent control over the three times and the three realms.