Frame mounts without using panel mounting space. Included security bracket mounts to top of lower door projecting into rack within 1/4 inch of mounting rails thus securing contents of the lower section when the top door is open. Security bracket is factory-installed when the LDDF frame is ordered with the rack, but it can also be field-installed with two screws Equipment with protruding knobs may need to be re-positioned to accommodate the security bracket. Order door(s) separately Spec Sheet:  2462-LDDF35 Frame Installation (optional alternate key lock): 18352-KeyAssm TAA compliant BAA compliant USA-certified steel Made in USA The rack shall be equipped with dual-door frame model LDDF-35, which will accept 1 or 2 short surface-mount front doors to separate and/or secure access to mounted equipment. The surface-mount steel frame shall extend 1″ from the rack. It shall attach to factory-installed threaded inserts on the rack, without drilling. Inserts shall be located on right and left to accommodate mounting on either side. The dual-door frame shall be steel with black powder coat paint. The doors and an alternate key lock, if needed, shall be ordered separately. The dual-door frame shall be made in the USA with USA-certified steel. It shall be Trade Agreement Act (TAA) compliant and Buy American Act (BAA) compliant. Front door: LFD Series (solid) | LFD–P Series (plexiglass) | LFD—FV Series (full vent) Key and lock assembly with alternate lock : LLKRD