The SMK DUO equipment (set) for rail distribution and replacement consists of low four-wheeled bogies, each with 4 hangers for hanging the transported rails and light portable gantry cranes with a device for lifting and moving the rails, located on the upper beams of the bogies. The bogie is equipped with road tires with high load capacity. It is intended for transporting rail strips on a paved gravel plain, especially for spreading auxiliary rails. The bogie is equipped with eyes for towing behind a vehicle using a drawbar with a towing pin with a diameter of Ø40 mm.