A nut & a bolt made of solid brass are handed out for inspection and a ring borrowed from the audience. The ring is placed on the nut and the bolt is threaded to lock in the ring. There are a lot of threads on the nut and it takes a while to completely bolt the nut. Yet you are able to remove the ring off the nut in an instant in full view of the audience.
This Ring of Nut comes in a cute little plastic box with complete instructions and routines. Also comes with an extra nut & bolt for the over inquisitive audience. Each nut is about 2 3/4" in length.