HASHTAG (AKA SHIFT) Cast Metal Puzzle from Hanayama Puzzles of Japan is both a delightful and tricky brain teaser puzzle. It consists of a "3D Hashtag-Shaped" cast metal body body with four interlocking pieces. The object is to separate the four pieces. The second puzzle is to re-assemble the four flat pieces back together. Measures approximately 3.6cm in three dimensions when assembled. This is a really fascinating disentanglement brainteaser.
This product contains small parts and is a choking hazard so not suitable for children under 3 years old.