From a beautifully turned wooden box (75 mm high, 35 mm diameter), you remove a screw with a round wooden ring secured by a nut. Loosening the nut releases the round wood. This arrangement is demonstrated and explained in detail.

The whole thing is then placed in the can and the lid is put on. Hocus-pocus, the lid is opened, and a spectator takes out the screw. However, the nut is no longer on the thread; it has penetrated the entire structure and is lying on the bottom of the wooden can.

A sophisticated preparation makes this small miracle possible. Everything can be examined. The secret cannot be discovered.