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. Rivet beams allow easy, tool free shelf installation.