MARBLE Cast Metal Puzzle from Hanayama Puzzles of Japan is both a delightful and tricky brain teaser puzzle. It consists of FOUR pieces which completely separate.
The object is to disassemble and assemble back together. Measures approximately 1.25 inches across.
This is a really fascinating disentanglement brainteaser. You may find yourself turning the center ball around and around for longer than you planned.
Rated by the manufacturer as a level 4 difficulty (on a scale of 1 to 6 where 6 is the most challenging.) Level of difficulty shown on front lower left of the packaging. Your own experience could vary substantially. MARBLE is part of a series of 45 plus very interesting and mentally provocative metal brain teasers from the Hanayama Puzzle Company. Some serious puzzlers refer to these as "disentanglement-style puzzles" as they involve taking something apart and then re-assembling. Re-assembly can also be a puzzle and may be equally as tricky.
Reminder. NO FORCE is ever required to solve the puzzle. Just a series of clever moves.