This is an evocative design of a sturdy padlock. Just pick it up and you’ll quickly gain an appreciation for the challenge that lies ahead – this puzzle will not open easily! The interior is comprised of two elliptical pieces, locked together tightly around the circular pieces and obstinately refusing to be released. But don’t give up! Repeatedly separate and then put them back together and prove you have what it takes to unlock this riddle.

The theme is “obstinacy.” Designed by Korean designer JinHoo Ahn. Approximate size is 1-3/4" x 1-1/4" x 1".

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 5 puzzles are considered difficult by most puzzlers.