Abstract: In various representative aspects, an apparatus for securing accessories to a steel-wired shelf. More specifically, the apparatus is an interface that conforms to the shapes of openings in the side panels on the shelf units and provides an interference fit. A variety of accessories can be secured to the interfaces by using a standard nut and bolt connection means. A second embodiment pertains to an interface that is secured to the evenly spaced horizontal wire arrays on the shelves that can level objects that are placed on top of the wire array. Various embodiments of the apparatuses are also provided.