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 Note: 1. Please allow 1-3 mm error due to manual measurement and 1-3g weight error make sure you don't mind before ordering. 2. 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 make sure you don't mind before ordering, thank you! About Shipping: 1.please pay attention to your delivery address such as: name, street, house number, doorbell/email without name, etc. is correct, or the order will not be delivered correctly. 2.All items will be shipped within 3 business days after the payment is received. Most times you will receive them within 8-12 days then. The specific delivery time is depend on circumstances. 3.During the shopping process, if you have any questions, please feel free to consult us, we will reply you within 275 hours Hope you have a pleasant shopping experience!