To help reduce the amount of time required to properly install Dell components into either of the Dell rack cabinets, Dell has created the Dell Rack Mounting Kits. They include the unique-to-Dell RapidRails mounting brackets which utilize captive thumbscrews for tool-free installation and are designed to make physical set-up of the hardware faster than ever before. This product has been tested and validated on Dell systems to ensure it will work with your computer and is compatible with Dell PowerEdge 1750/ 850/ 860/ R200 Servers.