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 Style: General Storage; Box Type: FastFold; Material(s): 2 Ply Bottom; 2 Ply End; 2 Ply Side; Strength: Heavy-Duty.