nVent Hoffman A727224FSD Steel Enclosure Freestanding Steel Enclosure Type 12 for indoor use have sturdy unibody construction. Concealed easy to remove hinges and 3-point latch system with keylocking handle, and door with bonding provsions, stay in place gasket and includes data pocket. Internal mounting channels welded horizontally to sides at top, bottom and center,rack mount angles can be mounted anywhere along channels. Studs to add backplates for mounting equipment. Stiffiners on back fo two door models to to maintain flatness and increase rigidity.