Rivet beams allow easy, tool free shelf installation. Boltless shelf allows easy access to stored items from all sides. Particleboard wood decking is supported by durable steel beams that adjust at 1-1/2" increments. Baked enamel finish. Includes 2 cross shelf beams and 2 side support beams for rigidity. Includes 5/8" thick particleboard wood deck. Double rivet beams offer extra strength for greater capacity., Lot of 1