Instant assemblyï¿½just push corners together and the box is ready for use. Heavy duty, double-side, double-end construction for stacking, storage, and transport you can trust. Reinforced tear-resistant hand holes make box comfortable to carry. Deep, locking lift-off lid stays in place for secure file storage. Box Style: N/A; Box Type: Prestoï¿½ Instant Assembly!; Material(s): Corrugated; Strength: Maximum.