No center punch or pilot hole required. Rounder, more accurate holes. Faster penetration. Drills tough alloys. Added strength against breakage KnKut 3/8" Reduced Shank Performance Drill Bits feature a 135 degree split point for fast penetration and accurate starting without the need of a center punch. Made of Hi-Molybdenum tool steel with the body and clearance surface treated for maximum lubricity. Space age Nitro-Carbonized steel withstands higher drilling temperatures while maintaining sharpness. Precision ground point, flutes, body clearance and drill diameter give you the ultimate in accuracy and performance. Recommended for use in work-hardened grades of stainless steel and other hard metal drilling applications. Reduced Shanks begin with size 25/64" and above.