Got these a few yyears ago. Sunex is mostly Taiwanese manufactured, but the quality shows. Great chrome, excellent fit/finish, and the flex joint is firm but not too tight -- PERFECT!!
Taiwan COO, but very good quality -- Spline drive
The only letdown is the plastic tray. It's very flimsy; very thin plastic that cracks easily, and it's way too tall. I also don't get the two storage wells on opposite sides of the tray. It doesn't make sense because the entire package is too tall to fit in a shallow toolbox drawer, and it uses way too much real estate to be of any use as a permanent storage solution. A minor annoyance, but if they'd make a smaller shallow tray, it would be a lot more useful.
Sunex is a great product, and I have never had a problem with them. I still have a set of 1981 MATCO 1/2" impact sockets that were sourced from Sunex at the time, and they are as good today as they were 35 years ago. Good tools!
Sorry for the bad i-phone pics--
