Right??? I was thinking the exact same thing, I am going to have to put my 6 and 7mm PC nut drivers in with this set.....I found that the radio control car/plane/helicopter crowd has some great tool sets in these sizes!
This is a small precision set.
6 and 7 is getting big for this set.
Most of this set is very very tiny. The small common blade and small Phillips screwdrivers are so small the blades are hard to see. Same thing with the hex keys. This is a very "fine" set. The 4.5, 5, and 5.5mm Nutdrivers are the heavy lifters in this set. They are at the end of the range.
It works great for me when I am in a Laptop or Cell phone.
I don't run across 7mm that much, but I do have to use 6mm. But the handles for my 6 and 7 are large, I have them in a Snap-On set and a Wiha set, they are not really fine precision tools.
I'd like to see the sets you are referring to.