They also share the same guide rails and landing doors. (treehugger.com)
Opening the folio case up, you slide the tablet into guide rails at the base (making sure the protective door covering the USB port is open) and secure it with a flexible plastic clasp up top. (trustedreviews.com)
The escalator's guide rails wind up in a gentle helix, level out at the top and wind down again to complete a single unbroken loop. (newscientist.com)