The Vita-Mix 891 Drive Socket Kit provides a reliable connection between the blender motor and drive assembly for smooth power transfer. This kit includes a 12-pin drive socket with a 1-3/4" outside diameter, designed to engage the compatible drive components during operation. As the motor runs, the socket transfers rotational force to the blending mechanism, helping maintain consiste... https://partsfe.ca/drive-socket-for-vitamix-part-891