Ergonomic design! Presto handles are engineered for maximum comfort & reduced wrist strain. Instant assembly – just push corners together, & the box is ready for use. Heavy-duty, double-end, double-side & double-bottom construction for stacking, storage & transport you can trust. Deep, locking, lift-off lid stays in place for secure file storage. Secure, zip-tie closure for added security (ties not included). Reinforced, tear-resistant hand holes. Box Type: Stackable File Storage; Box Style: Presto Instant Assembly; Strength: Heavy-Duty; File Size Format: Letter / Legal.