The Key (Online Instructions) by Wayne Dobson
no key included, just instructions video download
This is the close-up effect of the year... 

Inspired by Peter Crush. Designed by Alan Rorrison. 

The spectator immediately gets intimately involved with this effect, as it utilizes their own ring. The magician presents a key, followed by impossible-looking miracles whereby the spectator's ring and the key link and unlink. These occur in several different ways, keeping the spectator intrigued throughout. The Key is a winner! 

Beautifully crafted! Comes complete with spare matching regular key. 

"I have always loved this effect, and Wayne's gimmick is awesome! The Key is a 'must have' prop for any magician. Innocent looking and beautifully engineered. Well done, Wayne, for breathing new life into this modern-day classic." 
- Peter Nardi