✔A GREAT CHOICE – SECURE PAPERS EASILY: Our handy rings for books are a great choice when it comes to binding ring for index cards or fastening the papers. Be it holding cards, menus, scrape books, swatches, or photo albums, the binder rings lock everything securely and you can always count on them..✔EASY TO USE – WON'T CRACK: These ring clips for index cards pull to open and squeeze to close are easy to use. Its tightly locked design keeps your items organized so they won’t scatter or fell. Besides, our book rings are rust-proof and won’t crack easily..✔HIGH-QUALITY STAINLESS STEEL BINDER RINGS: The binder rings are made of high-quality iron that will not crack. DURABLE, multi-layer, and nickel-plated steel stands the test of time and also withstands heavy use. A metal swivel at the center of the metal rings for index cards allows it to split in two halves yet hold the ring in place..✔DO NOT OVERLOOK BECAUSE OF ITS WEIGHT: 1 inch in diameter, the book rings are wide and hold the weight of 0.287. The less in weight yet sturdy rings have the ability to hold 175 sheets of 20 lb. paper, hence making these index card rings the best choice for your biggest projects. They can also hold thick stacks of paper such as contract drafts or manuals..✔WHAT’S IN THE PACK: The pack contains 100 pieces of notebook rings in silver color to complement every item. Moreover, the color of these metal rings lasts long. These keep their shape and do not stretch.