Usage Tips:Product Attributes: Package includes 10 replacement parts for metal 3-ring binder mechanism, measures 8 inches in length; hole diameter is 0.8 inches; distance between holes: 2.64 inches Material: Made of high-quality metal, made of high-quality stainless steel material, using electroplating process, corrosion-resistant and durable, it will be a long-term use for notebook binder Durable and Sturdy: Suitable for A5 sized loose leaf notebooks or other A5 sized plans with broken ring binding mechanisms. It is sturdy and will be the long-term use of notebook binder Easy to Use: When you need to add or delete pages, you can easily open and close them, making them easy to use and very suitable for organizing projects, documents, etc Widely Used: The binding mechanism is spiral and easy to replace, making it easy to replace your planner, junior, and more, suitable for office, school, home and many other occasions L: 206mm/8inch W: 20mm/0.8inch 2 holes distance: 67mm/2.64inch Hole: 20mm/0.8inch Colour:silver Material:Metal Package Contents: 10 * 3-Ring Binder Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.