This Marbig Business Card Book Case has a 4 ring binder mechanism allowing you to add and remove pages as you please. The rigid case features reinforced binding edges on the plastic pockets for added durability. The tabs and inserts allow you to organise your cards, enabling you to find the card you need quickly and efficiently. This binder has the capacity to hold up to 500 business cards. The pockets are made from durable, protective plastic that resists tearing. The 4 D-Rings allow you to efficiently add and remove pages. Each page can hold up to 20 business cards, back to back. It has a black cover giving it a professional finish.