I spoke with Larry at T&D rockers about the adjusters and he has talked with Jay Brown about them as well. He told me that they tested the adjusters and it took up to 60 ft/lbs of torue to break them and they should be torqued about 20 ft/lbs. They also installed them in a press and it took about 2 tons to bust them when pressing on them. He also told me that they in stalled in a vice and hammered on them and they held up real well. The only thing he can figure is that they got over torqued. I do know that he is sending Jay some more just incase a few bad ones got out.
I have used their products for about 15 years now and have had very little problems with them. Most of the top NASCAR teams are using them as well so I know they make good stuff. I have looked at the adjusters myself and can see no problems with them what so ever. I guess time will tell how they work but I also know that Larry stands behind his product unlike some other people we know. Good luck, Keith Craft