The ICON Vehicle Dynamics F-350 Super Duty (Dual Rear Wheel)/2003-2013 Dodge Ram 2500 and 2003-2012 Dodge Ram 3500 15” U-bolt kit consists of high-quality grade 8 U-bolts to ensure that the leaf springs stay properly secured to the rear axle. Featuring a black E-coat finish for corrosion resistance and a length of 15” these U-bolts will work with a variety of leaf spring and rear block options. All mounting nuts and washers are also included to make sure installation is quick and easy.