5/16, Extra Length Drills, High Speed Steel, Black Oxide, 118° Point
Because of the inaccessibility or the extreme depth of a hole, it is found that even long series drills are not long enough. The drilling of such holes generally requires the use of an Extra Length Drill. The drills are made with a general purpose flute design which will perform satisfactorily under the widest range of operating conditions and materials.
