"I always enjoy Mr. Osanori's designs, and the N-One is no exception. Three pieces, uncomplicated, with a fun level 15.3 solution. The keyring serves two purposes...you could actually use this to hold keys, the pieces arent going anywhere (May not want them being rough handled in a purse or pocket though). Additionally, the chain blocks a second solution...so, remove the chain and see if you can find another way to put the pieces together.
This puzzle is quite accurate, with precise tolerances. Contrasting woods were used to illustrate the solved position and give the puzzle a more interesting look.
A total of 44 copies made for sale, each signed and dated." -Eric Fuller