• Nice 3D Unlock Interlocking Puzzle Set: you will get 10 pieces of 3D metal puzzles in 10 different styles, and they are wrapped in a black drawstring bag, nice set to meet your various needs, and easy to store
• Helpful and Practical: these brain puzzles can help train your eye hand coordination, problem solving skills, expand your mind, and improve your reasoning skills, helpful and useful, and they are also nice for relieving stress and keeping your brain focused
• Quality and Reliable Material: these mind puzzles for adults are mainly made of metal, which is sturdy and reusable, reliable and safe to use, not easy to break or rust, and they are also easy to clean
• Easy to Operate: our metal puzzle is compact and portable to carry around, proper size makes it easy for you to operate, user friendly, allowing you, your family or friend to play comfortably
• Nice Gift Choices: these brain puzzles for adults are useful and educational, which can be applied as nice and meaningful gifts for your friend, families, relatives, classmates, colleagues, etc., suitable for teens and adults; Note: some of them will be relatively difficult