TWIST Hanayama cast Metal Brain Teaser Puzzle (Level 4)Hanayamas Twist brainteaser gives you no clues to the solution - and thats part of the fun. This elegant puzzle by puzzle designer Oskar van Deventer was formerly known as Snake Ball. Using the grooves, slide the protrusions to separate the pieces of this complicated little puzzle. After you separate the two-tone metal shape into its components, can you put it back together again This cast metal puzzle designed by Oskar van Deventer is considered difficulty level 4 (challenging). Measures 15.4 mm. Hanayama is known worldwide for challenging puzzles and quality manufacturing. BePuzzled is more than just jigsaw puzzles - its puzzle-plus.