I've had mine for a few years, so maybe they are the DeWalt ones.
I had an issue with my "Lifetime" warranted 3/8 wrench and CT did replace it no charge, the catch being that the one they replaced it with only had a 1y warranty. I told the service desk staff at that time that they can't effectively change the original item's warranty terms but I just got a blank look and a shrug..... Not really an issue unless I have to replace it once more.
I suspect that some owners simply brought in a lifetime warranty wrench in every couple of years to exchange it for a new one vs. getting it recalibrated and it took CT a few years to figure this out.