With these puzzles, Hanayama tried to bring the “Cast Metal Puzzle” back to life. To create these puzzles, zinc alloy is melted and cast into a metal mould. They are called “Cast Puzzle” because of the manufacturing process; the casting method.
Cast Loop puzzles offer an unlimited amount of mystery. Collectability is also one of the features that attracts people. Once you’ve solved one, you’ll no doubt want to challenge your intellect with another.