These are high quality ball joints. I am a former tool and mold maker and know exactly what is important when manufacturing a quality component. They are precision made, well machined and torqued just like a new quality ball joint should be. These are lubricated units and I'm sure they will last a long time with the occasional lubrication. I know small businesses need a chance, and if they keep their promises, I'll stick with them. Installation is the same for all similar ball joints. I am 100% sure about these ball joints for my Ford 4x4 pickup.