Please consider that the workpiece must be hanged when plating. In the galvanic bath, the coating is deposited by electric current, so the workpiece has to become conductive as well. This is achieved by connecting the workpiece to the circuit with suspension and binding. These are the hanging points. Therefore, we designed tweezers to minimize the point of attachment because the coating will not be perfect in these points.
Due to the dispersion of the galvanic bath, the coating does not deposit in the inner, deeper cavities.