2/4Set A4 3Hole Ring Binder Mechanisms D Ring Replacement Binder Planner Loose Leaf Binding Spines for Organizers DIY Fill Paper These Binder Mechanisms have significant advantages in organizing files and notes and have become the preferred tool for many people. In addition to being a file organization tool, they can also be used to make notes, notebooks, etc., meeting the diverse needs of users._x000D_ _x000D_ Specifications: Color: Silver Tone; Recommend Paper Size: A4; Material: Metal; Packing List: 2/4 Set Size(LxWxH) D-Ring Inner Height_x000D_ 280x20x25mm 16mm_x000D_ 280x20x30.8mm 20mm_x000D_ 280x20x35.8mm 25mm_x000D_ 280x26x35.3mm 25mm_x000D_ 280x26x42.9mm 30mm_x000D_ 280x26x50.7mm 38mm_x000D_ 280x26x62.7mm 50mm_x000D_ _x000D_ Advantage: _x000D_ The Binder Mechanism is made of durable and long-lasting metal material. This allows it to withstand the wear and tear and collisions of daily use and extend its service life;_x000D_ D-shaped binder rings are designed to keep papers straight for easy writing and overall organization;_x000D_ It is not only suitable for regular-sized paper such as A4 but can also accommodate loose-leaf paper of different sizes and types to meet the needs of different users._x000D_ _x000D_ Instruction: _x000D_ This binding spines comb set comes with all the necessary components, including screws and nuts, for easy installation. The rings can be easily opened and closed when you need to add or remove pages and securely fasten the pages._x000D_ _x000D_ NOTE: Due to shooting lighting and angle issues, the actual object may not match the example picture. It may be tight when you open it for the first time, which is normal. _x000D_