A small two-headed drum played with one hand.

A small hand drum.

An implement held by several forms of Mahākāla and a number of forms of the goddesses in The Glorious Sovereign Tantra of Mahākāla. The ḍamaru is typically a hand-held, double-sided drum with two strikers. Each side of the drum can be made out of various substances, but in many tantric Buddhist traditions the two halves of this drum are made out of human skulls.

A hand-held double-sided drum.