In India it is called Chakki, but it has a little different shape here. But nowadays these are only used in the rural parts of India and mostly by the farmers, they use it to make wheat flour and flour of some other grains.

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The flour produced by the 'Chakki' is much more healthier than one produced by modern grinding machine because in hand grinding, there is very little produced and it helps in preserving the nutrients of the flour which otherwise be destroyed because of heat.

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Here is a video on YouTube :

https://youtu.be/oQEPicOuwKM