The Fireking 2 Hour Rated Vertical File Cabinet features Thermocell II proprietary insulation reinforced by a galvanized steel wire lattice. It is designed to keep the interior of your file cabinet below 350 degrees and is water resistant to prevent damage from sprinklers and fire hoses. Each drawer is a separate insulated container that securely locks with a UL®-listed Medeco high-security key lock. The welded-steel drawer heads are filled with fireproof insulation and the drawer pulls are surface mounted to provide extra insulation. The cabinet body is composed of scratch-resistant and replaceable steel panels to provide a lifetime of quality appearance. Securely store your important documents knowing that they are protected from fire, water damage, impact, and explosion.