No center punch or pilot hole required. Rounder, more accurate holes. Faster penetration. Reduces user fatigue. Added strength against breakage KnKut Performance Drill Bits are engineered with an exclusive combination of premium steel, superior geometry, and a nitride treatment. KnKut Performance Drill Bits reduce drilling cycles and maximizes the number of holes per drill. KnKut Drill Bits are manufactured from a high grade M-7 Molbydenum High Speed Steel (HSS), that has a high Vanadium content. Sizes include: 1/16" thru 1/4" by 64ths - The Ultimate in Performance!.