BINDERBOX Storage Box Locking Lid White/Blue 12/Carton - Holds eight 1 1/2" binders or a variety of binders up to 3" with extra hand room for quick binder retrieval. - Heavy duty triple end double side double bottom construction handles the weight of full binders. - FastFold® quick and easy assembly. - Reinforced tear-resistant hand holes make box comfortable to carry. - Deep locking lift-off lid stays in place for secure file storage. - Box Type: Fast Fold™ Material(s): Corrugated Strength: Heavy-Duty File Size Format: Binders.