Unlock the challenge of the Cast Keyhole metal puzzle from Hanayama Huzzle. This intricate 3D puzzle is crafted from high quality metal and features a unique keyhole design that will put your problem solving skills to the test. At first glance, the two pieces have simple angles cut into their flat surfaces, like the edge of a key. However, when the two pieces intertwine, they look more like a 3D maze.

Designed by Finnish designer, Vesa Timonen, the objective is to separate the two pieces of the Cast Keyhole and then to reassemble it into its original state. With its sleek and modern appearance, it makes for a great gift for him or her, perfect for puzzle enthusiasts and those who appreciate a good brain teaser.