Keyhole - level 4 - A brainteaser of the brand Huzzle, the new name of Cast Puzzle

The brain breakers of Huzzle Cast puzzles all have the same challenge:

Can you take the puzzle apart? And, do you get the puzzle back together?

Enjoy the beautiful quality of the metal product. Perfectly finished!

This brain teaser scores a difficulty level 4 out of 6. A challenge. The 2 parts seem simple, but once they are put together they form a real 3D maze. Take your time. Try to be quick? Then I'm sure you just turn around.