A display rack comprises a display rack comprises a base adapted to be mounted to a wall, wherein the base defines an elongate slot having a retracted end, an extended end opposite the retracted end, a first groove and a second groove, wherein the first groove is positioned between the retracted position and the second groove, and a tray having a fin movable with respect to the slot as the tray slides along the base between a retracted position wherein the fin is generally adjacent the retracted end and remote from the first groove, and an extended position wherein the fin is at the second groove of the elongate slot. The fin preferably extends perpendicular to the elongate slot and the tray is movable to an initial position where the fin is positioned in the first groove. The fin is preferably provided with a first flange with a first width and a second flange with a second width narrower than the first width. The first groove is large enough to allow the fin to pass through, and the second groove is large enough to allow the second flange but not the first flange to pass through.