Features: Tactical entertainment: Our metal brain puzzles are more than just playthings. They’re tools to sharpen your thinking, problem solving skills and patience Ideal for most ages: Whether you’re a newbie looking for a special challenge or a puzzle enthusiast building a collection, our metal puzzles are the nice fit. They are suitable for youngsters and adults alike, providing an entertaining way to stimulate intellectual curiosity Specifications: Material: metal Color: silver, black Package includes: 24 x Metal puzzles Notes: Manual measurement, please allow slight errors on size. The color may exist a slight difference due to different screen displays.