These end caps are used for Shelf & Rod shelving only, when creating 'open ends' or floating shelves. For every open end that you are creating you will need 1 of these open end caps, in addition to the 203 - small plastic end caps that will cover the wires toward the back of the shelf.
These end caps will cover the cut ends of Shelf & Rod shelving and also stop hangers from falling off of the hang bar!