Features: High-quality material,made from premium-metal with drop proof locking designs. these binder rings are designed to keep their shape and built-sturdy to last. they won't bend, rust, or bear scratches, even with massive daily use. Built-sturdy,the latch-on-the book rings is quite easy to open, but will securely lock in place. tight locking makes your collections organized and even strong enough to hold your key chain. Smooth clasp,smoothest open index-card rings, slide paper through the holes, close the clasp with ease. the rings will keep your whole work organized effectively. hold tons,each variety pack comes with 10 flashcard rings in a resealable bag. each rings holds up much loose leaf papers, flashcard sets, booklets, worksheets, index-cards or task cards. Get organized,our rings clip is a great way to get more organized in your classroom, office or home. these are effectively designed to be used by all, adults and kids with ease. Specifications: Material:Metal Style:A-1,B-1,C-1,D-1,E-1 Note: Please allow 1-2cm errors due to manual measurement. Due to the difference betweeen different monitors,the picture may not reflect the actual color of the item. Package includes: 10Pieces Loose Leaf Binder Rings