This set includes 8 different types of puzzle rings with varying difficulty levels, from beginner to advanced. 【For Brain Activation】 Perfect for developing thinking skills and concentration. 【For Children's Education】 Using fingertips cultivates imagination and perseverance. 【For Brain Training for Seniors】 Hand exercises and brain stimulation are also recommended for preventing dementia and rehabilitation. 【Compact Size】 Easy to carry, perfect for killing time during travel or waiting periods. 【Set Contents】 • 16 Puzzle Rings (Red Sheet: 8 types, Blue Sheet: 8 types) 【Size】 Approximately 3cm (varies depending on the type) 【Material】 Steel ~About Discounts~ Bundle discounts available ◎ Shipping costs will be reduced! Please feel free to contact us. ☺︎ ★About Shipping★ To provide them at a low price, they will be shipped in simple packaging. ⚠︎Caution⚠︎ ⚫︎There may be minor scratches, slight fraying, loose stitching, and variations in shape and size. Please understand this before purchasing. ⚫︎Items in bags are opened once for inspection before shipping. ⚫︎The colors on the screen may appear different from the actual product. ⚫︎Please note that there may be slight errors due to amateur measurements. ⚫︎If there are any defective products, please contact us before leaving a review. We will respond sincerely. If you have any questions, please feel free to comment. ☺︎