If there is a monster equipped with “Ring of Magnetism” on the opponent’s side of the field, if your monsters are going to attack they must attack the equipped monster. Even Toon Monsters, “Inaba White Rabbit”, and monsters like “Jinzo #7” and “Queen’s Double” that can normally Attack Directly must attack the equipped monster.
If you have two or more monsters on your side of the field equipped with your “Ring of Magnetism” cards, you choose which monster will be attacked.
Netrep Rulings:
If a monster equipped with “Ring of Magnetism” changes control, the opponent of the current controller of the monster will have to attack the monster equipped with “Ring of Magnetism.”