This is a model for the dual axis dc motor with gear reduction you can drop in in your design to fit the shape, size and placement of screws and axis. The real motor is: https://www.banggood.com/5Pcs-DC-3V-6V-Dual-Axis-Gear-Reducer-Motor-For-Arduino-Smart-Car-p-949555.html?p=TH241428726122015109 (affiliate link) and meant to be used in robots/cars controlled by an Arduino board.