12 PCS 4 Inch D-Shaped Loose Leaf Binder Rings, Nickel Plated Metal Book Rings with Screw Lock for Index Cards, Documents, Keychains, DIY Crafts, Office, School, and Home Supplies (4 Inch)

4-Inch D-Shaped Loose Leaf Binder Rings: Each set contains 12 D-shaped binder rings, with a ring thickness of approximately 3.8mm/0.15 inches, an internal diameter length of about 102mm/4 inches, and a width of approximately 84mm/3.3 inches. They provide ample storage space to handle a large volume of materials. Convenient Opening and Secure Design: The D-shaped binder rings feature a user-friendly screw-lock design, allowing easy tightening or release of items by twisting the screw. The design enhances the gripping force after closure and includes an anti-slip feature to ensure the items stay securely in place, making them suitable for repeated use. Versatile and Flexible Applications: These D-shaped binder rings can be used to store index cards, memos, organize documents, keys, photo albums, jewelry, and for DIY decoration projects (such as curtain rings, keychains, etc.). They are suitable for a wide range of settings, including home, office, school, and craft projects. High-Quality Durable Material: The D-shaped nickel-plated metal binder rings are made of nickel-plated iron, offering resistance to rust and fading. The smooth surface is gentle on hands, and the rings are strong enough to hold heavy materials without breaking, providing excellent durability and stability for long-term use. Space-Saving: The compact and lightweight design of the D-shaped metal binder rings reduces space usage. They can be hung or stored in drawers to maintain organization and are easy to carry. The silver metal finish is simple and practical, making them a perfect fit for various office or home environments.