Burr In Cage 22
"An excellent new design by Ishino Keiichiro, this traditional 6 piece interlocking burr has only one solution. Removing the first piece requires 22 moves!
This puzzle was crafted with a variety of foreign exotic and premium domestic wood types. Its construction is sturdy, and it has been designed to last a very long time if not abused." -Eric Fuller
Burr In Cage 22 Designs