Your closet, only better.™ Now you can easily add shelving to your closet without tools and without having to tear out what you have! The Rubbermaid Closet Helper 4-Shelf Unit attaches to your existing shelf and provides a durable, smooth storage surface. Shelves adjust up and down using easy hand levers. Each shelf adds 2 ft of shelving adding 8 ft of shelving space to your closet. No tools required for installation or assembly. Height of the shelves is easily adjustable to fit your storage space and needs. Shelves sit flush against the wall for added stability. Works with existing wood or wire shelves.