Ideal for archiving and storing end tab letter/legal patient files. Heavy-duty, triple-end, double-side, double-bottom construction stacks up stronger and withstands frequent handling. 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: Stackable File Storage; Box Style: FastFold Quick & Easy Assembly; Strength: Heavy-Duty; File Size Format: Letter/Legal.