High-quality binder rings: made of nickel-plated metal, robust, smooth, stable and durable, tightly closed, ideal for storing loose items that organise your books stably. Thanks to the nickel-plated surface, books rings are very smooth and beautiful.Size of book rings: loose leaf connector rings are 20 mm inner diameter and 25 mm outer diameter, a total of 100 pieces binder rings that meet your different needs.Wide application: these binder rings are very practical, suitable for loose leaf, paper cards, memorandum, scrapbooks, photo album, colour fields, sample holders, index cards, key rings, etc. This allows you to easily link loose objects together.Easy to use: book rings consists of two parts and is connected to each other by a rotating rivet. It only needs to be pulled to open and pressed to close. With these practical tools (book binding rings) you can organise your loose sheets.Pack of 100 loose leaf rings: loose leaf book rings set are enough to meet your long-term use needs. Tips: you have any problems, please feel free to contact us. We strive to provide you with a satisfactory shopping experience.