The small stick included in the pictures for scale is about 9cm long and is usually used for tensioning the mridangam to permanantly take up slack or temporarally raise the sruti
The tool is made from bamboo, carved to a blunt chisel shape
at the 'business' end and
has a steel ring to prevent shattering at the 'hitting' end
The final picture shows where to apply the business end of the tool to the head...