BOX Hanayama Cast Metal Brain Teaser Puzzle _ New in 2012 Chrome Ring with small opening is entangled within a cubic metal frame. Object is to remove the ring. Then replace to the start position. Ring moves freely around the metal box. Rated as a level 2 on a scale of 1 to 6. Your experience could differ. Metal Disentanglement Style Puzzle from Hanayama Puzzles of Japan.