1. Difficulty Level: This 3D metal puzzle is rated 4/5 in difficulty, making it ideal for those seeking a medium challenge. The assembly time is approximately 3.5 hours, ensuring a fun and engaging experience. 2. Quality and Precision: The 3D metal puzzles are crafted from quality materials using precise lasercutting technology. Each piece is designed with accuracy for seamless assembly without additional tools. To separate and bend the parts, you may use standard pliers or tweezers. Simply detach the pieces and fold the tabs as instructed in the manual. 3. Hobby: Not only is this a fun and exciting activity, but assembling 3D metal puzzles also enhances cognitive skills, problemsolving abilities, concentration, and manual dexterity. Note: 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. Sold by-YJL official store Product Notes: Please allow a little manual errors.Due to the lighting of the photos and the difference of monitors, the pictures may not reflect the actual color of the real item. Please confirm acceptance before ordering. About Shipping: Please ensure your shipping informations are correct to avoid delivery issues. All orders are shipped within 3 days after payment. Delivery usually takes 8–12 days, The specific delivery time is depend on circumstances. If you have any questions during your purchase, feel free to contact us. We will respond you within 275 hours.