Wooden two-headed drum. Heads held in place and tuned by bolts. Held horizontally, both heads are played with the hands (no beaters). In India, these very talked-about percussion instruments are often utilized in folk music and all over marriage ceremonies. The shells are manufactured within the northern Indian State of Uttar Pradesh. There in the community grown neem and rosewood are used. After transporting to Mumbai the goat skin heads are suited to the drum shells with nut and bolts for simple tuning.Every drum will vary, approximate measurements:Approximately 17.5 inches long (444.5 mm), base head has a load inside and is 8.5 inches (215.9 mm), tenor head 6.5 inches (165.1 mm)The Load within the bass head is a mix of tar, clay and sand (dholak masala) which lowers the pitch and provides a well-defined tone.