Cast Equa is part of the renowned Hanayama Cast Puzzle series, celebrated for its complex metal designs and challenging gameplay. Designed by Oskar van Deventer, this puzzle draws inspiration from planetary rings, combining its sleek, metallic aesthetic with a sophisticated mechanical challenge. Its difficulty and intricate craftsmanship make it a favorite among collectors and puzzle enthusiasts, especially those who enjoy mechanical and metal puzzles. With a difficulty ranking of 5/6 stars in the Huzzle collection.