Operation: The handle should be cranked clockwise to remove kernels from the cob, ideally with properly dried corn for easier processing.Adjustability: A spring-loaded tensioner with a thumb screw allows the sheller to accommodate different sizes and shapes of corn cobs.Productivity: These manual machines can shell approximately ten to fifteen bushels per hour, or about one cob every ten seconds.Stability: The base of the thresher includes fixed holes, allowing it to be secured to a stool or wooden surface for increased stability during operation.