Description: The Intelligence Educational Unlock Toy Puzzle Composes of 9 Different Locks Rings Puzzles. Bronze Steel material and weighted. This product aims at keep brain activities. It also training kids imagination, IQ Brain Teaser Puzzles Improves Thinking Capabilities for Longer Lasting Brain Health. Metal brain teasers puzzles for adults children's creative thinking and improve your logical thinking. Specification: Material: Steel Ring Size: 11.5x6.4cm / 4.52 x 2.52inch. Color: Bronze Quantity: 9 Pieces Shape: 9 Different Ring Locks Package Includes: Set of 9 Metal Brain Teaser Puzzles Note: Not suitable for kids under 6 years old. Please allow 1-3mm differs due to manual measurement. Due to the different display and different light, the picture may not reflect the actual color of the item. Thank for your understanding