Again, I appreciate the answers.
I don't select blades by numbers #1, # 2, #3
I select by width, thickness and TPI.
Saying to use a #2/0 or #3 etc is not a clear answer.
#2/0 width can be .022, .024, .026, .028
Thickness can be from .010 to .012
TPI can .028 to .037
Then there is "Reverse, Skip tooth, Double skip. "
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If I have to my smallest drill bit, a 69 (.0292) then the smallest blade
Yes different blades cut different depending on width, thickness, TPI etc
and I will NEVER use a spiral !!!!!!!