It is designed for light daily use, whether it is office, home, or classroom, it is perfect for organizing projects, presentations, etc. They keep important documents, recipes, or projects neatly in place. The Binder Mechanism is made of and long-lasting metal material, perfect for your daily document sorting needs. Perfect for classroom, office and home. Colour:silver Material:Metal Size:10.3x0.5 inches/26.3x1.5 cm(L*W) Instructions: 1. Open the ring buckle. 2. Put in the paper documents you want to add. 3. Press the ring buckle to binder. Package Contents: 5 * binding clips 10 pairs * screws Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.