Two U-shaped bolts and four nuts – this looks like a combination of spare parts but looks are deceiving. This puzzle comes with a deviously hidden trick. The key to unlocking these parts is to look carefully at each part first. The theme is complexity. It was designed by Kyoo Wong.
Hanayama is known worldwide for challenging puzzles and quality manufacturing. Can you take the pieces apart, then put them back together again? Hanayama cast metal brain teasers have 6 levels of difficulty, and each puzzle is Mensa-rated. Level 4 puzzles are considered challenging by most puzzlers.