The Buyers 18" x 18" Bolted Formed Steel Mounting Brackets Black is the perfect solution for securely mounting your steel truck box. These brackets are constructed from strong formed steel and finished in a black powder coating that resists corrosion. They are conveniently offered in pairs in boxes and can be used with either bolt-on or welded braces. With a height of 18" and a depth of 18", these brackets are designed to hold down stainless steel and thick gauge steel underbody truck boxes. Installation is quick and easy, making them the ideal choice for any truck box installation. FleetPride is your First Click in Heavy Duty®.