Wide range of uses for loose-leaf, flash cards, memo filing, key rings and sample holder<br> Closed , not scattered after collapse, keep your desk always organized<br> The steel metal round rings can be split into two halves and is by a metal swivel rivet which is located at the of the ring<br> You can easily link numerous loose-leaf booklets, paper cards, name tags, instruction guides or plastic plates <br> How to use:<br> The loose book ring has 2 parts and is linked by a swivel rivet, very easy to operate, you can pull the opening to open and squeeze to .<br> Notes:<br> Do not leave your children using the book rings alone, adult is required.<br> size: thickness 2mm, inner diameter 15mm, outer diameter 19mm<br> Material:iron<br> colour:Silver<br> Package Contents:<br> 100 * Rings<br> Only the above package content, other are not included.<br> Note: Light and different displays may cause the color of the item in the a little different from the real thing. The measurement allowed error is +/- 1-3cm. Note: Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement. Sold by-YJL official store