The RackSolutions 1U Cobra 110-A Dry Slide Rail for Dell is the ideal replacement for Dell ReadyRails, providing enhanced durability and versatility for mounting 1U Dell PowerEdge servers. Compatible with 11th-14th Gen PowerEdge models like the R320, R410, and R620, these dry slide rails offer a longer lifespan compared to ball-bearing alternatives. Designed to fit both 2 Post and 4 Post racks, the Cobra 110-A Rail features an adjustable mounting depth of 20-32" for 4 Post racks and 3-6" for 2 Post racks, making it suitable for a wide range of server rack configurations. The rails easily extend to allow for full equipment access, simplifying servicing without the need for Dell's OEM ReadyRail kit. Additionally, the rails are compatible with universal square, round, and threaded holes, supporting various rack upright shapes like L, C, and ?. With the Cobra 110-A Rail, you'll have a sturdy, reliable, and long-lasting solution for mounting and servicing your Dell PowerEdge servers.