No center punch or pilot hole required. Rounder, more accurate holes. Faster penetration. Drills tough alloys. Reduces user fatigue Premium grade KnKut Drill Bits are manufactured from a high grade M-7 Molybdenum high speed steel, that has a high vanadium content. KnKut Performance Drill Bits are salt nitride treated, actually penetrating the tool's surface giving KnKut Drill Bits the hardness to drill tough materials such as stainless steel and titanium alloy.