A nut, a bolt, a small plastic sleeve and a small container with lid are shown. The threaded portion of the bolt is pushed through the sleeve. The nut is placed on the bolt and screwed. The screwed nut-bolt is then placed within the container and covered with the lid. The container is shaken for a while. The rattling sound of the nut-bolt is heard. The lid is then removed. By toppling the container the nut-bolt is thrown on the table. It is seen that the nut and bolt has been unscrewed and separated magically. The nut, bolt and the container are handed over to the spectator for inspection.
 
• Everything can be checked.
• The item is cm 6,5 (in. 2,5).
• Suitable for any kind of audience.