The Fireking 4 Drawer Vertical File Cabinet features 100% gypsum fireproof insulation and is water resistant to damage from sprinklers and fire hoses. Each drawer is a separate insulated container that securely locks with either a standard key lock or a UL®-listed high-security 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.