No center punch or pilot hole needed. Featuring 3/8" reduced shanks. 135 degree split point design will not walk. Faster penetration. Rounder, more accurate holes KnKut Jobber Length Drills out perform high speed drills and even cobalt drills in many applications! KnKut Drills are manufactured from a high grade M-7 Molybdenum High Speed Steel (HSS), that has a high Vanadium content. KnKut Performance Drills are salt nitride treated, actually penetrating the tool's surface giving KnKut Drills the hardness to drill tough materials such as stainless steel and titanium alloy.