Built To Fit The R6525 and R650 Like An OEM Rail With over 20 years in the server rack industry, RackSolutions is fully capable of creating rails that rival OEM products. All necessary screws and nuts are included to help achieve the perfect fit with any hole type. Comes Ready To Mount In 2-post Or 4-post Racks No conversion kit needed! This rail ships ready to mount in 2-post (telco or relay) racks and 4-post racks. Depth can be easily adjusted by shifting the rear brackets.