a magnetic knob is provided for use with a series of plates attached to threaded mounts which may be substituted for kitchen or bathroom cabinet door or drawer knobs . the user simply unscrews existing kitchen and / or bathroom cabinet knobs and replaces them with flat metal plates attached to threaded shafts . the metal plates are a direct replacement for the existing knobs and may not require any drilling or screwing or even use of tools . once installed , the metal plates provide no means of gripping . thus , the cabinet cannot be opened by a child or other unauthorized user . a knob provided with a strong magnet is provided so that an authorized user may attach the knob to one of the metal plates and thus open the cabinet .