This gear assembly by Hankscraft was meant to slowly rotate handing displays. It was designed for high torque and slow speed. Size is 1-3/4" diameter x 3/4" open type housing (excluding mounting ears). Has 0.122" diameter x about 1.65" (hook) to hold item to be rotated. On the top is an opening where a motor with pinon gear was to be attached - we don't have the motor or gear. New Old Stock.