This two-piece aluminum table support makes it easy to attach one edge of your table to the wall. Just mount one piece on the wall and the other on the edge of your table. The track on the table hangs on the track that is attached to the wall. The 30" support can be cut to any length. The wall mount is 1" high and the other piece that mounts to the table has a mounting surface 11/16" high. Pre-drilled holes are 4" apart.