The Aristocrat Extra Heavy Duty System from American Retail Supply. • For use with the heaviest loads. • 1/2" slots, 1 in on center for 1" adjustments. • Heavy Duty Mirror Polished Chrome Standards & Hardware Wall System This is produced in accordance with major U.S. manufacturer's standards with regard to steel hardness and wall thickness. Some imported lines may not meet these exact standards. The ARISTOCRAT SYSTEM is recommended for the most severe loads and where traffic conditions demand a more durable line of hardware. General specifications: .125" steel thickness. Let American Retail Supply save you more time and money by providing your metal stud needs with factory installed concealed standards. Specify standards on one or two sides. F.O.B factory.