The Hallowell Boltless Shelving Add-On is an industrial shelving unit designed for storage and organization. It is made of steel with a powder-coated finish and has adjustable shelves that can be repositioned in 1-inch increments. The unit measures 36"W x 18"D x 84"H and each shelf has a 450 lb weight capacity. The boltless design allows for quick assembly and reconfiguration. This shelving add-on can be combined with other units to expand storage space. It's ideal for warehouses, supply rooms, garages, and other commercial/industrial settings.