I just rebuilt my driveshaft with three of these and a socket yoke. I only rebuilt the driveshaft because the socket yoke was squeaking a bit. After 100,000 miles on the TOM WOODS driveshaft installed when my truck was new, these u-Joints were OK. AND my truck was built to be an exhibition model by ARB, so it got a LOT more use than a normal driveshaft. I also spend a fair amount of time in the mud, so these pars are what I would consider to be "Field Tested Tough" and I am quite happy with their performance.