Bolt Miracle (brass)

Magician borrows a ring from spectator and then takes out a bolt and a lock which can be examined. Magician puts a nut on the bolt and asks the spectator to lock the bolt. After that, magician gives the key to spectator to keep. Then magician takes out a handkerchief to cover the bot and uses his magical power to make the ring come into the bolt!

All can be examined.

Bolt,nut ,lock and online explanation are included.

Notice:You provide the handkerchief.