Chakki is a Punjabi term for a small set of 2 millstones (usually less than 24" in diameter) used to grind corn into flour. As late as the 1950s it was common for most households in Punjab to have a "Chakki". As grains tend to go rancid much quicker when they are ground the device allowed each household to mill only as much as was needed each day. The upper stone had a handle attached that allowed it to be rotated. The upper stone has a hole in the center into which the grain was poured. Grains could be left coarse or milled to a fine powder, such as atta (flour) or grist ) which is used to make chappati (flat bread), rotis, naans or parohtas, etc.