Abstract: Stacking machines, delivery units, and methods suitable for handling and stacking sheets of material, and particularly sheets of magnetizable materials that are relatively heavy and susceptible to damage during a stacking operation. Such a stacking machine includes at least one delivery unit equipped with a belt and a magnetic unit. The belt and magnetic unit are adapted to operate in cooperation with each other to magnetically carry individual sheets of a magnetizable material from one side of the machine to another. The delivery unit may be part of a kit that can be installed as a unit on an existing stacking machine.