Heavy Duty. Ball joints are a common wear item on any Jeep that can produce vibrations, steering wander or even clunking noises. When installing a lift kit on your Jeep it's a great time to replace the weak factory ball joints with a heavy-duty joint that is designed to handle the additional stresses of oversize tires. Rough Country's replacement ball joints are designed from the ground up to give you a stronger, longer-lasting ball joint that is a direct factory replacement.\ Innovative Design. Rough Country Heavy Duty Replacement Ball Joints are packed with features that you won't find in other inferior designs. At the heart of each Rough Country ball joint is a high-precision Chromoly ball stud that is oil-quenched, tempered and has spiral grooves to ensure lubrication during intense use. These ball joints are fully greaseable and feature a "metal on metal" design to provide a longer life span compared to joints featuring plastic or polymer components.\ One-Year Replacement Warranty. Rough Country Heavy Duty Replacement Ball Joints are backed with a one-year replacement warranty towards manufacturer defects. As such, the product is protected from structural and workmanship damage after the date of purchase. With our industry-leading warranty give yourself peace of mind when using Rough Country's Suspension products!