Binder rings: Openable rings used to protect punched papers with each other within a binder

https://www.notion.so/Binder-dividers-Tabs-put-right-into-binders-to-separate-and-organize-different-topics-c58091d6f74b4a9f8c39403cdce6dc63?pvs=4

Binder rings: Openable rings used to safeguard punched documents with each other within a binder