To easily organize your card pages, card file binder features One-touch EasyOpen rings that open, close & lock with one simple motion. Delayed tension means closing rings will not clamp down & pinch fingers if they get in the way. Complete outfit holds 400 cards with up to 20 per view & 1-1/2" expansion. Letter-size card file binder includes A-Z index tabs & 20 nonglare, archival-safe, business card pages. Pages may be added to increase capacity. Maximum capacity of binder is 800 cards.