High Quality materials: The Brain Teaser Puzzle is made from high-quality beechwood, which gives it a beautiful and natural look. It is also durable and long-lasting, ensuring that you can enjoy it for years to come. Extremely challenging: This puzzle is not for the faint-hearted. It requires at least 671 steps to solve, making it one of the most challenging puzzles on the market. You'll need to use all of your problem-solving skills and cognitive abilities to unlock its secrets. Beautiful design: The Brain Teaser Puzzle is not only challenging but also beautiful.