To help reduce the amount of time required to properly install Dell components into either of the Dell rack cabinets, Dell has created the Rack Mounting Kits. They include the unique-to-Dell VersaRails mounting brackets which are designed to make physical set-up of the hardware faster than ever before. This product is designed for your Dell PowerEdge 6850/6950 Server. This kit is designed for installation into round or square hole, 4-post cabinet style racks meeting certain specifications.