Keyhole level 4
Price: £7.95 / €8.75
Hanayama's Keyhole Puzzle is a high quality cast metal brain teaser
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