DOBINSONS U-BOLT KIT, PAIR - UB59-453-1KMade from the highest quality raw materials to give years of life under the harshest conditions Over 60 years of leaf spring design and manufacturing Includes 4 U bolts,some vehicles require 1 kits Requires lifted leaf springs to ensure proper fitment Dobinsons u bolt kit. Suited specifically for the thicker Dobinsons leaf springs that offer lift, sold separately. Dobinsons leaf springs are manufactured from only the highest quality raw materials. We