This rail system with the panels makes it so easy to customize your closets, and/or pantry in any home. The corner shelves make it a delight to fulfill the entire space available. I do suggest, and used the metal corner supports (2 pk Home Depot) vs. what came with the corner shelving unit. This rail system make it all possible. Love, Love this product...how nice is that to be 60 years old, and can customize any closet by yourself! OK to use 2 shorter rails, unless you are attaching several panels over the length of the wall.