PartsW 6 Piece Suspension Kit for Ford Explorer/Explorer Sport Trac, Ranger Mazda B2300 B2500 B3000 B4000 & Mercury Mountaineer, Lower Ball Joint Inner & Outer Tie Rod Ends Undergo impact, wear, and fatigue testing to help ensure quality and durability Advanced corrosion protection against the harshest conditions / Precision-made performance and additional strength Designed with PREMIUM quality materials for exceptional performance, reliability and peace of mind Dust boot is re-installed and permanently attached to reduce contamination, and increase durability and service life Premium alloy steel stud for strength and durability / Replacement improves handling