Cast U&U - Hanayama Metal Puzzle

This isn't fancy, or elegant or pretty look at, or seeming that belongs anywhere but at the bottom of a mechanics tool box for that matter. But none of this lessens the challenge. If you've got patience enough to precisely twist and configure for hours at a time - go for it. It also happens to be one of the few cast puzzles that won't clank in the ears of those in your doctor's office waiting room or line at the DMV, where you're likely to pull it out thinking you can solve it this time. Really doesn't seem like it should separate and even when it does, still doesn't really make sense. This is similar to Nutcase and to me much more a challenge.