Golden Key

Imagine taking a solid brass skeleton key- and magically making the teeth suddenly and mysteriously twist around the stem at your command!

And then- the teeth move all the way up to the top of the key!

But there's more!
You can then hand the key to your spectator so that he can see that the teeth are welded solidly to the shaft of the key!
There is NO WAY the teeth could have moved!

Yes, it's a mystery!
But it's easy for YOU- once you know the secret!