Our book rings are versatile and practical, ideal for binding 3-hole calendars and other documents. These iron rings are openable, allowing you to add or remove pages with ease. Whether you're creating a custom calendar or organizing flashcards, these binder rings are a must-have accessory. The practical iron construction ensures use, making them ideal for both personal and professional projects. Features -Color:Silver -Material:Iron -Size:4.00X2.00X0.25cm/1.57X0.79X0.10in -Wire Diameter: 2.5 mm -Inner Diameter: 20 mm -Sturdy iron: made from iron, these 3ring binder rings are designed to provide exceptional durability and longevity. -Effortless operation: the snap closure feature allows for easy opening and closing, making it simple to manage your documents -Wide range of uses: ideal for binding calendars, notebooks, and various other items, these rings are highly versatile and practical -Reliable security: the strong clasp mechanism ensures that your papers remain securely in place, preventing any accidental dislodging -ideal for diy projects: these iron rings are ideal for diy enthusiasts, enabling you to create diy planners, scrapbooks, and more Package list: 10 x desk calendar binding rings