The ReadyRails static rail kit for 1U Systems provides tool-less support for 4-post racks with square or unthreaded round mounting holes including all generations of Dell racks. It also supports tooled mounting in 4-post threaded racks and 2-post (Telco) racks for added versatility.
Rack rail kit (2/4 post)
2 rack outer rails, 2 rack inner rails
Height (Rack Units)
4 post rack mountable, 2 post rack mountable, tool-less