The Cast Duet metal puzzle from Hanayama Huzzle is a beautiful and challenging addition to any puzzle collection. This 3D puzzle is made from high quality metal and features two interconnected pieces that must be separated and reassembled. At first glance, it looks as if there is only one ring hanging from the grid but there are in fact two rings attached with a magnetic force.

The objective is to separate the two rings and then try to fit the two rings at the four-crossing points on the grid indicated by the numbers. The level of difficulty increases as players aim for crossings with higher numbers. Designer Oskar van Deventer has packed a lot of challenges in this elegantly designed puzzle that needs to be solved.