The metal binding rings are great for organizing your desk calendar or other paper materials. These binder accessories are designed to securely hold your loose leaf pages, making them ideal for creating a handmade calendar. Simply open the metal binder rings, insert pages, and close the rings to keep everything in place. Features -Inner diameter: 20 mm -Color:Silver -Material:Iron -Size:4.00X2.50X2.50cm/1.57X0.98X0.98in -Easy to use: The binding rings feature a simple and user-friendly design. To open, simply pull the rings apart, insert your pages, and then close them securely -Robust construction: Our loose leaf binding rings are made of iron, featuring performance, will withstand frequent use and heavy pages -Versatile application: These desk calendar rings are ideal for not only making calendars but also binding documents, notebooks, and more, offering multiple uses -Secure closure: Our loose leaf rings have a secure closure mechanism. Once closed, the rings hold the pages firmly, preventing them from accidentally falling out -Easy page flipping: The metal binder spine rings allow for easy page flipping, making it convenient to through your calendar, notebook, or photo album Package list: 20 x binding rings