Upgraded 5/8″ diameter U-bolts stock Ford is 9/16″. For use in 2000-2004 F250/F350/Excursion 4WD trucks with leaf springs. Includes new u-bolts, hardened flat washers, lock washers, and new high-strength nuts. Sold 2 u-bolts per kit, if you are replacing both sides, you will need 2 kits. Please note: These U-bolts only fit the 2000-2004 4X4 F250/350 Super Duty trucks and Excursions with half-round tops. They do not fit the 1999 4X4 F250/350 Super Duty trucks and Excursions. Please contact us for more information.