One of the unique advantages of Dynatrac HD Ball Joints for the 2007-2015 Jeep Wrangler JK and 1999-2004 Jeep Grand Cherokee (WJ) is that they are rebuildable. And you do not need to remove the ball joints from the axle housing in order to rebuild them; they can be rebuilt in place with common hand tools. Our rebuild kit includes new bearings, seals, clips and nuts as required by the specific application. All of the new components are the same high-quality of the originals. Both sets of replacement components shown in the photos are included in the kit to rebuild both the upper and lower ball joints.