PartsW 2 Pieces Suspension Kit for Ford Lincoln Mazda & Mercury, Lower Ball Joints Left & Right 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 / Undergo impact, wear, and fatigue testing to help ensure quality and durability Full ball metal stud provides 360 of smooth rotational movement for more responsive steering.