They are made of metal material, which can be used for a long time. Creative in design, but they are practical to use, which will give you a good use experience. Add style to your desktop. Use these binder clips to accent your planner pages or keep notes, receipts and . Features -Color:Silver -Material:Metal -Size:8.50X8.50X0.20cm/3.34X3.34X0.08in -Outer Diameter:85mm/3.34in; Inner Diameter:75mm/2.95in - Made of good and practical metal material, and practical for use. - The practical binder rings are meticulously made, and the color is not easy to peel off. - Beautiful and practical, this binder rings are home, office, school, etc. - Lightweight and portable, they are very convenient for you to carry. It is very useful. - You can use these binder rings to bind loose-leaf paper quickly and neatly without wasting time. Package list: 12 x Binder Rings