The Metro SMA21A-ADD SmartLever Arm (Single) is a 21-inch, epoxy-coated or stainless steel arm designed for adjustable cantilever workstations. Part of the SmartLever series, it features a patent-pending design that supports heavy loads and accommodates various shelf widths. Includes ArmKeepers for enhanced adjustability and security, along with shelf mounting hooks and locking wedges. Ideal for creating modular and customizable shelving systems in industrial and commercial environments. Orders over $7,000 may qualify for free shipping; Contact us for details.