Tool-less rack rails can be installed into racks with square holes. Rack mount equipment weighing up to 200 lbs (90.7 kgs) can be installed using a tool-less rack rail. The rack rail is 27.87" (708 mm) deep and can be installed into server racks with installation depths from 28 - 30" (711 - 762 mm) and supports equipment up to 35" (889 mm). The tool-less rack rail is primarily for 4Post racks, but it can be installed in other 2Post configurations as well with the addition of 2Post conversion kits. Center mount installations require 2POST-2UKIT and flush mount installations require 4UKIT-003