The khol is a terracotta two-sided drum used in northern and eastern India for accompaniment with devotional music (bhakti). It is also known as a mridanga (< Sanskrit mrit + anga, lit. 'clay limb'), not to be confused with mridangam. It originates from the Indian states of West Bengal, Assam and Manipur. The drum is played with palms and fingers of both hands. The khol is a drum with a hollow earthen body, with drumheads at both ends, one far smaller than the other. The drumheads are made of cow or goat skin, and are three-layered and treated with a circle of rice paste, glue, and iron known as syahi. Some modern instruments are made with a fibreglass body and synthetic drumheads.