Jato (Stone Grinder) Wikipedia
Janto (Devanagari:जाँतो) is a form of grinder in the Himalayan region of Nepal, Sikkim, Darjeeling and Bhutan, which is made of up of is a type of rotary hand consists of two round stones of which the bottom part is attached to the ground or the floor in the house and has a big nail or wood in the centre to keep the top stone in place while grinding.