To tell the truth, YATO is Chinese rubbish, only tweaked (nicely polished, suitcase, sponge) and I will not change my mind. Imagine my father is rusty. How can chrome keys get rusty? I also thought so far that this is not possible, but the truth is otherwise. If I don't forget, I'll take a photo in the evening and throw it, but the set is more or less like this:

I was fixing something on the car and it suddenly clouded over, but before it started to rain, I buried everything. Unfortunately, I did not notice that a dozen drops of rain fell on the keys in the suitcase. I closed the suitcase and put it neatly into a drawer.
One day I open it and I don't believe my eyes: corrosion on the keys and the fact that "chrome" rusted to steel. Unfortunately, this cannot be removed. Tragedy.
So I believe that the YATO brand makes decent tools only theoretically.
I still have the old RAFAN domestic production key set. They have been soaked by rain more than once and there is no sign of rust.
So, since YATO tools are incalculable in terms of repeatable quality (sometimes they will be good and sometimes bad), I advise you to avoid them.
Cheers!
Tom
YATO quality. Let me remind you, a few drops of rain fell on them only once and after a few days the effect was: