You present a black tablet with two holes through which a cord runs, the ends of which are tightly tied into a bow. You then place a large button on it, followed by a handkerchief. A spectator holds all of this.

A little bit of abracadabra, then pull off the cloth and:
The button is now firmly knotted into the cord...

Of course, the viewer can now examine this button miracle closely. They won't discover any preparations or secret compartments! - A miracle has happened, hasn't it?

Not an automatic trick, but a gem of sleight of hand. - The tablet is not replaced. - No magnet, no elastic band, or similar aids. - You will receive the complete accessories without the cloth, but with German instructions.