This customer had purchased her home several months ago to be near her children and grandchildren, but had never seen the upstairs due to limited mobility. Because there was a door immediately at the bottom of the staircase, she needed a folding rail. The Harmar SL 300 Folding Rail operates with sensors to automatically fold up as soon as the stair lift reaches the end of the track. This way, the path to the next room is kept clear. She was THRILLED to finally see the upstairs of her brand new home!