Boltless EDSAL Rivet Lock Single-Rivet Shelving provides maximum strength—with fewer parts and fast, easy assembly. No bolts, nuts, or clips are required! Rivet-type locks engage into keyhole slot. Shelves adjust on 1-1/2" increments. Storage rack allows easy access from all sides without cumbersome bracing. Storage units feature maximum shelf clearance and double-rivet beam construction on top and bottom for extra rigidity. Low-profile single-rivet construction on intermediate shelves and on intermediate front-to-back supports. Order 5/8" particleboard decking separately. Gray baked-on enamel finish. Made in USA.