DerbyDad03 wrote in
:

I was not aware that router bits came with 3/8" shanks, so I called
MLCS. When I asked about the 3/8" collet, the tech support guy said:

The only 3/8th shank router bit I've ever seen was a
3/8th straight bit. It was probably solid carbide,
I can't think of another reason not to use either a
1/4 or 1/2 shank.

John