Vertical Fire File is UL Classified for 1 hour fire protection at 1700 degrees Fahrenheit to protect documents, records and valuables against catastrophic loss. Being UL Classified 30' drop tested means the file contents remain intact and locked in an impact equivalent to falling two stories. UL classified Explosion Hazard resistant design integrity protects contents against explosions in case of sudden exposure to intense heat. Plunger key lock secures all drawers. File accommodates letter-size, hanging file folders, and each drawer includes a movable divider or follower block for supporting manila folders. Steel-lined interior conceals cabinet insulation and protects contents from unwanted dust. Rugged suspension system design ensures smooth drawer movement even when fully loaded. File also includes easy-to-use, recessed handles with label holders