Sourcingmap 12 Pack Loose Leaf Binder Rings, 3.1 Inch Metal Binder Rings Hinge Snap Book Ring, Keychain Key Rings for Index Cards, Home or Office

Size: 3.3 inch, 84 mm diameter (outer ring); 3.1 inch, 80 mm diameter (inside ring); 12 pieces loose leaf rings. Durable Material: Big book rings is made of metal material, strong and durable, Multi-layer nickel-plated steel, rings prevent rusting, color unfading Easy to Operate: The binder ring open and close easily, lock for extra security, easy to operate, pull to open and squeeze to close. Closed tight, not scattered after collapse, a good organizer Multi-Function: Book rings are suitable for loose-leaf, memo filing, key rings, book, scrapbook, notebooks, index cards, binding recipe, photos, sample book, sample holders, contract or file Wide Application: Key ring binder are suitable for offices, homes, and crafts, catering to various everyday file management and creative projects