Wikipedia
Udukai
The udukkai( Tamil: உடுக்கை) or uduku is a membranophone instrument used in folk music and prayers in Tamil Nadu and it is originated in Tamil Nadu as well. Its shape is similar to other Indian hourglass drums, having a small snare stretched over one side. The udakku is played with the hand and the pitch may be altered by squeezing the lacing in the middle. The damru in the hands of Lord Shiva is also referred to as udukkai.