This puzzle belongs to the cast series of Hanayama's puzzles and is ranked as 5/6.
This puzzle is quite original because there are many pieces, not 2, not 3 but 5! And the pieces look all identical...
The goal is the separate the different pieces, but when you try to take off one piece, it is blocked. When you try with another piece, it is blocked again by the other pieces. And this is the same thing for all pieces! The puzzle is pleasant to handle due to its shape and is very strong. You cannot damage it easily, luckily.
I can say the same thing as for cast news about the difficulty: here we are supposed to have a difficult puzzle, this is the case. But again, when you know how to solve it, it takes less than 10 seconds. So that's true that the solution is not easy to find. But once you know it, the puzzle is easy to be repeatedly solved.
|So many pieces...|
This puzzle is quite tricky and I don't think any of the other Hanayama's cast puzzles have the same mechanism.
To conclude, this puzzle is a must-have in your puzzle collection.