• 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. Its intricate design and natural wood finish make it a stunning addition to any room or office.
• Perfect for all ages: Whether you're a teenager, an adult, or a senior citizen, the Brain Teaser Puzzle is a great way to challenge yourself and improve your cognitive abilities. It's also a great gift for puzzle enthusiasts and anyone who loves a good challenge.
• Top Level and Large Size: This Brain Teaser Puzzle is the hardest one, the theory is like a lock, but more complicated. Please kindly note that this one don't with the general manual, but with a key theory. The size is 20*11*14 cm and 1.2 kg