The Bluebird 539007232 Aerator Jack Shaft W/Key helps transfer rotational power within compatible aerator equipment for smooth and reliable operation. Designed as a replacement jack shaft assembly, it connects with the drive components and supports proper power transmission during use. The included key helps secure the shaft to the corresponding component, maintaining a firm connectio... https://www.wholetoolbox.com/bluebird-539007232-aerator-jack-shaft-w-key/539007232.html