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. U & U was puzzle of the year at IPP 2014 in London, U.K.
Hanayama's U & U Puzzle is a high quality cast metal brain teaser from inventor Kyoo Wong
Discover how to separate these two interlocking pieces and then try to reassemble them!
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