The trolley can be used single-sided and double-sided. It is only required to load it from one side, the shelf arms are turned and mechanically locked in one direction. When it is required to increase the amount of stored materials on the shelf, or the length of the item, to be transported is large, the trolley can be easily converted into a double-sided version. It is sufficient to unlock the position of the arms, set them in the double-sided mode and mechanically lock the position of the arms.