Even experienced modelers have difficulty drilling and tapping holes for wing bolts, and a motor mount presents an even greater. challenge-these Tap-N-Drill Guides make these operations simple and. assure success every time. Includes guide holes for the taps and drills you use most. Handles common drills from 1/16'' to 1/4'' and all taps and drills from 2-56 through 1/4''. One Three Piece Tap-N-Drill Guide Set. This is a Three Piece Tap-N-Drill Guide Set from
.....
...more about the Harry B. Higley Tap/Drill Guide Set (3)