The Double Think Binary Ring Puzzle by Sergej Abramenkov. Twisty puzzle.

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  • i have one of these its very easy to solve and it have an interesting mechanism

  • It reminds me of the hungarian rings, but it's obviously much more complicated than that.

  • lol 1984 reference in a puzzle I love it

  • that looks complicated, but thats what I said the first time I saw a rubik's cube

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