Kobalt started-out using Williams, then cut costs and moved to Danaher/Armstrong, then I think they cheaped-out again and went overseas, and now they're pretty-much a dead brand.
It's like the whole downfall of the USA Tool Industry, in a neat, orderly, compacted time-line.
Some of the Kobalt tools are still good.
Kobalt is still a store brand though, and there are price expectations for store brands.
Danaher madd nice stuff, but got combined with Copper tools, rebranded to Apex, (which was originally a sub-brand), then got mostly sold to Baine Capital, which then tried to combine facilities, resulting in a clusterf@ck similar to what happened decades ago when Stanley trued to combine MAC Tools production facilities.
Baine/Apex then offshored production of a number of items, which still seem in many cases to be well made.
Lowes presumably could have gone with a different US manufacturer like SK, but probably wanted better profit margins, since the Kobalt brand us owned by Lowes, meaning Lowes has to eat potential problems with the tools, and returns.
JH Williams, (owned by Snap-On), also started selling imported tools under The Williams brand, so Lowes probably figured going to the sources overseas was a cheaper and better alternative, with higher profit margins.