The phrase "sliding rails" refers to a set of tracks on which something can move smoothly back and forth.
Sentences with «sliding rails»
The door could be moved horizontally along sliding rails to left or right by use of the head or the foot. (sciencedaily.com)
Simply raise the lifting bar of the machine to the desired height and plug in the handles in the first slide rail hole above the bar. (ironmaster.com)
When playing at home, you can charge the screen on the dock and slide those rails onto a controller base that gives you a more classic gaming style. (knowtechie.com)