A Nut and a bolt are shown. The bolt has two holes going right through it, one near its head and the other at the opposite end. Also the nut has a hole that goes right through it. The performer screws the nut on the bolt aligning the hole in the nut with the one in the bolt. Once these holes are aligned, he threads a chain through the nut and bolt thus blocking them together. Although it seems impossible to unscrew the nut that is blocked on the bolt with the chain, mysteriously the performer manages to unscrew it right up to the other hole in the bolt, where the chain is pulled away. The chain has incredibly penetrated the bolt.
 
A great little close up impossibility!
 
• No skill required, it can be repeated immediately.
• It will leave the spectators scratching their heads.
• The item is made of brass, everything can be examined.