Easy to use hook hardware for the hanger itself. M4 (ISO) screws are cut on the tip so you can use M4 nuts to remove them. Bag nut M4 included. (+Driver #2) Bag nuts will be tin cobalt plated. Pack of 10 * When the nut of the bag becomes loose or removed, you may also use a loosening agent (screw lock) (can be removed something), glue (cannot be removed later).