Convenient Packaging: Each pack of 10 loose-leaf book rings provides enough quantity to make multiple notebooks, reducing the need for frequent purchases. You will have enough space to meet your needs and share with family or friends. Versatile Size: The general size of these metal binders is about 1.57 inches x 0.98 inches (40 mm x 25 mm), with an inner diameter of 0.79 inches (20 mm), suitable for most books and photo albums. Their size makes them perfect for a variety of DIY projects, including travel diaries, photo albums, scrapbooks, loose-leaf notebooks, and graduation alumni books. Reliable and Durable: This binder ring is made of multi-layer stainless steel for durability. It is waterproof, rust-proof, and not easy to break, providing reliable performance even in harsh environments. Flexible and Secure: These 3-ring metal binder rings adopt a carefully designed separation design, which can be easily divided into two halves and firmly connected with metal swivel rivets. This ensures that the binder is firmly and tightly locked, preventing any loose pages or papers from falling out. Wide Range of Applications: These flexible and versatile metal binder rings can be easily opened and closed, providing endless possibilities for organization and creation. Can be used for DIY travel diaries, photo albums, scrapbooks, loose-leaf notebooks, etc. Their sturdy construction ensures that they can withstand frequent use in offices, classrooms, or home environments.