Huzzle H & H Puzzle
This is quite simply the most inspiring collection of puzzles ever created.
These puzzles are hopelessly addictive and are arguably the most collectable puzzles on the planet, The H & H puzzle has a difficulty rating of 5.
Hanayama is a Japanese toy company formed in 1972. They are best known for their "Cast" series of cast metal puzzles which include reproductions of older designs, and new puzzles by designers Oskar van Diventer and Akio Yamamoto. Hanayama rate their puzzles with a difficulty level ranging from 1 to 6. The difficulty increases as the number ascends.