Opens with any key, anytime. Lucky Key is the ultimate padlock. Of the eight keys, only the key intended by the magician will open it. The keys can be mixed freely. You can have the audience mix them. They can freely choose any key, and they can exchange them as they wish. Of course, they don't have to exchange them, and they can exchange them again after exchanging them. They can even exchange them with the magician's key, no problem. All choices are completely up to the audience. In this impossible situation, only the key intended by the magician will open it. Nothing else will open it. Wonderful. Operation is very simple. There's nothing complicated like which key opens it, or which key comes after which. Anyone can do it immediately. It can be performed not only in close-up but also in a salon setting, and you can gain more than 5 minutes by incorporating a psychological battle with the audience. Ideal for adding to your repertoire. It's a beautiful item, used only a few times. The case is made of transparent plastic, so there are inevitably small scratches, but they do not affect use. The retail price is about 7500 yen.