Specifications: 9 kinds of interesting interlocked rings set to offer freshness and fun all the time. The product with appropriate hardness, smooth turned door and without burr, which is harmless to the hands and safe to play. It helps to exercise the brain, improve problem solving skills, relieve pressure and more. A good choice to train your brain in any free time or send as a gift to your friends. Item Name: Puzzle Wire Material: Metal Quantity: 9Pcs/Set Features: IQ Brain Teaser, Kids/Adult Toy, Challenging Box Size: 14.6cm x 15.6cm x 1.5cm/5.75" x 6.14" x 0.59" (Approx.) Notes: The degree of difficulty increases from A, B, C, to D. Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement. Package Includes: 1 Set of Puzzle Wires