This is a set of Dell Poweredge Left & Right Rack Sliding Rails with part number TW-00TKYT-75021. These rails are designed to fit into standard 19-inch racks and can be used to easily install and slide in Dell Poweredge servers. They are made of high-quality materials and are very durable, ensuring that your servers stay secure and stable throughout their use. The rails come as a pack of two and are ideal for those who need to install multiple Dell Poweredge servers in a rack. They are compatible with a range of other Dell products and are easy to install and use.