The invention relates to a method and a device for producing a toothbrush or part thereof by the two-component or multi-component injection-molding process. The sequence of these control nucleic acids are at least in part parallel-complementary to the sequence of the target nucleic. A second cutting section is formed at the second ridge line with the lower side section along the second surface of the side surface forming a rake face. The shutter sections are maintained in the closed position by the attraction of metal strike plates on the first shutter section and corresponding magnets encased within the second shutter.