TOR exclusive USA-engineered powdered metal gusher bearing design enables grease to flow through the stud for reduced friction and enhanced strength and stability, Premium cover plate design allows for tighter tolerances vs traditional cover plate designs, providing a more durable and extended life for the ball joint, TOR engineered steel composition (40cr+) results in a stronger component. Our full-ball metal stud provides 36 degrees of smooth, consistent, rotational movement resulting in more responsive steering, An enlarged ball joint receptacle in the control arm can cause a loose ball joint fit. TOR exclusive design includes an oversized housing for a more secure fit, Dust boot is re-installed and permanently attached to reduce contaminants, and increase durability and service life, Full-ball type studs are manufactured using a cold-formed process to reduce imperfections and hold the tightest of tolerances, TOR greaseable socket design allows new lubricant to flush contaminants from the assembly, reducing corrosion and wear, TRUE