Viking Ultra-Bor Quick Release Super Premium Drill Bits feature a 1/4" quick release shank for mounting in all standard 1/4" Impact drivers and drills. Manufactured in the USA from special Hi-Molybdenum tool steel and feature a 135˚ split point for fast penetration and accurate starting without a center punch. Gold finish treated for maximum lubricity to reduce drilling effort and extend tool life. Specially designed mechanics length bits ideal for use with hand held drills and impact tools. Recommended use in work hardening grades of stainless steel and other hard metal drilling applications.