uxcell Metal Scrapbooking Book Binder Ring 25mm Outside Dia 20 Pcs Silver Tone Wide range of uses such as loose-leaf, memo filing, key rings and sample holders. Closed tight, not scattered after collapse, a good organizer. The round rings can be split into two halves and is held together by a metal swivel rivet which is located at the center of the ring. You can easily link numerous loose-leaf booklets, paper cards, name tags, instruction guides or plastic plates together. The ring open and close easily, lock for extra security, easy to operate, pull to open and squeeze to close.