An adjustable apparatus for supporting an electronic device within a rack including a fixed rail, a sliding rail, and a latch. The sliding rail is adjustably receivable within the fixed rail. The latch maintains the relative positions of the sliding and fixed rails to define a length of the apparatus that accommodates a dimension of the rack. The fixed rail may be an L-shaped bracket including a plurality of locating points which interact with the latch to maintain the position of the fixed and sliding rails, a plurality of tabs suitable for receiving the sliding rail; and at least one mounting feature suitable for attaching to the rack. The sliding rail may include a mounting feature suitable for attaching to the rack, ribs that interact with the latch, and an attachment point. The latch typically includes a lever body and a tension member to which the attachment point attaches.