STURDY BINDER RINGS: These round metal rings are made of carbon steel with a painted surface that is not easy to break, rust-proof, and corrosion-resistant. TIGHT LOCKING DESIGN: These paper leaf binder rings are easy to handle and organize your books quickly and tightly without falling apart when folded. SIZE AND COLORS: We have it in 30mm/ 1.18" Outer Diameter and 12 colors for you to choose from, you can choose the one you like to DIY your own notebook or decoration. How to use it? 1. Find out the buckle seam firstly 2. Pull the buckle up and down to open it 3. Pull the left and right ends oppositely to expand the ring 4. Install paper into this ring the quantity depends on your needs, finally squeeze to close it If you need to add more paper, you can reopen the buckle and then add it. Wide Application: Binder Rings are widely used in classroom, home, or office for organizing loose pages, scrapbooks, photos, note cards, sample books, sample holders, or documents. Can also be used to hold keys, hang decorations, create a handmade journal, or do DIY projects. Binder Rings are widely used in classroom, home, or office for organizing loose pages, scrapbooks, photos, note cards, sample books, sample holders, or documents. Can also be used to hold keys, hang decorations, create a handmade journal, or do DIY projects. Binder Rings Spring O Rings Split Keychain Rings Split Key Rings with Chain Buying Options Buying Options Buying Options Buying Options Customer Reviews 4.7 out of 5 stars 20 — — — Material Carbon Steel Carbon Steel Carbon Steel Carbon Steel Pack of 12 Pack 12 Pack 50 Pack 12 Pack Wide Application ✓ ✓ ✓ ✓