Update: I ordered a few some time ago and they finally arrived. Apparently the retailer kept getting 12-point versions due to "similar article numbers". Anyway, they are here now and the 4 wrenches cost me like 12-13 € total incl. shipping which is dirt cheap.
It doesn't specify COO but they say they are made in Poland.
The first thing I did was measure tolerances and they range from 0.15 to 0.25 mm over. Not too bad but not great either. The open end tends to be more accurate than the box end. The 4-point surface contact of the open end is a useless gimmick which does the opposite of what it's supposed to.
Finish is barely acceptable. Seems to be a very thin layer of Chrome and nothing else a.k.a the typical Chinese coat.
Some photos I took (I really need a macro lens):
Would I recommend them? If you need a 6-point box end, absolutely. The brand in general? No.