The Cast Padlock, part of the renowned Hanayama Cast Puzzle series, was designed by puzzle creator Vesa Timonen from Finland. His design draws inspiration from traditional padlocks, incorporating a mechanical challenge that engages puzzlers to "unlock" the pieces. Released by Hanayama, this puzzle features a durable metallic finish, capturing both the aesthetic and functional characteristics of a real padlock. With a difficulty rating of 5 out of 6 stars in the Huzzle series and a 9/10 difficulty, the puzzle presents an intermediate-level challenge, combining elements of both disassembly and mechanical discovery.