Moog K7399 Ball Joint Full ball metal stud provides 36 degrees of smooth, consistent, rotational movement resulting in more responsive steering. Wear indicator allows for quick visual inspection without lifting the vehicle. An enlarged ball joint receptacle in the control arm can cause a loose ball joint fit. Moog Problem Solver design includes an oversized housing for a more secure fit. Greaseable socket design allows new lubricant to flush contaminants from the assembly, reducing corrosion and wear Loose or worn chassis parts can lead to premature tire wear Greaseable socket design allows new lubricant to flush contaminants from the assembly, reducing corrosion and wear