SUPERIOR TOUGHNESS: Get longer-lasting performance from patented sintered bearings. QUICK AND EASY INSTALLATION: Simply secure ball joint to the vehicle with part specific castle nut & cotter pin provided. SIMPLE TO SERVICE: Make servicing a snap with the 180 degree SAE grease fitting included. TIGHTER GRIP: Avoid distortion and corrosion with knurling that ensures a snugger fit between connecting points. RESISTS CORROSION: Prevent rust build up and increase longevity with protective surface treatment.