Bells are hand cast in a variety of shapes and sizes displayed singularly or in a group to perform musical functions. The sound of each bell is set with an instrument called ekal. The tonal quality and the resonating sound are dependent on three factors inherent to the making. The shape and size of the bell, along with the wooden thong sourced from the local Khirad tree determines the sound it imparts. The structure and curvature of the bottom which is delicately beaten into shape using a harmonic hammer resonates the sound deepening its after glow. Bells chimed their way into Kutch from Sindh centuries ago, tied to the necks of migrating cattle.