Does This Exist

The ‘ADJUSTABLE DRILL BIT”  would take all these  (above) and leave it on one. That’s right you wouldn’t have to carry 12 different bits along and have to worry about changing them and losing them during a job just have the one which could be adjusted to the the thickness you want.  You would twist the one bit so it would go to the thickness you want and then lock it into place.  The “ADJUSTABLE DRILL BIT” the only bit you will need.

FOOTNOTE- It’s such a simple concept I wonder “does it already exist” and if not why?