It was just an example of a large bit. It can drill
a large hole. My 3/4 step bits have a 3/8 shank and
I have used them to drill 3/4" holes in 1/4 inch
aluminum without a problem. Comprehend before you
post.

TDD

Oh I do comprehend. Drilling a 3/4 hole with a 3/8 shank
through 1/4 aluminum could easily be a losing proposition.