Yato, Neo, King Tony and the "current Stanley" are basically one "shelf". With a downside for Stanley, because looking at the keys of this company, you have doubts ...
Andrzej20001 put it well in the workshop:
"Good key, as you assume, it enters quite tightly and is smooth inside, tightly on the bolt, nut"
a lot also depends on the screws because, for example, in the automotive industry and in the case of good manufacturers, they keep the tolerance well ... but sometimes even a screw made according to the standard, after putting a key on it, shows a not too "tight" connection, which is a sign of trouble.
There is also what others wrote that Yato has various designs, design and probably a lot of fakes, because olx has about 110 PLN 100 element boxes, and in the store the price is at least 2-3 times higher.
I have noticed that more and more good quality wrenches in hexagonal sockets have rounded corners, which increases resistance to breakage, minimizes the resulting notch and improves cooperation. I enclose a photo ... such caps are not visible in large sets of PLN 100

it's probably the Yato caps ... the first thing Google showed