In article ,
Adam Diehl wrote:

Countersinking wood screws is the first thing that spring to mind. One
diameter for the threaded portion of the screw, one for the unthreaded shank,
and one for the head.

Must be different than the step drills I'm used to. The one's I've used
have steps that are much too shallow (maybe 1/8" - 3/16" per step) to be
of any use for pre-drilling screw holes. I just use a combination drill
bit/countersink for that sort of thing. Anyone have a link to a step
drill specifically for wood screws?

-AD

Yeah, I thought the OP meant a Unibit-style step drill, but maybe he
did mean a wood screw combo bit, or maybe even a step drill for making
pocket holes?
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Larry Wasserman Baltimore, Maryland