If you look on their website they have cutaways and give detail to their strict manufacturing standards. I tried them out because I saw a video on a machine that tests the tensile strength by trying to seperate the ball from the socket. They out did Moog and Spicer by nearly a third on each test. Plus, seeing them last that long on the Burb and still be tight i'm sold! I put XRF uppers in my 2002 Envoy 40k ago and so far so good.
