Norseman 29P-CT - 29 Piece Ultra-Dex Cryogenic Nitrided Fractional Jobber Length Drill Bit Set

Norseman 190-CN Cryogenic Nitrided Jobber Length Premium drill bits with 3-Flat shanks. These heavy-duty 135° split point drills perform well in very demanding applications. The flats on the shank give positive chuck grip. The drills are ideal for use with hand held drills with keyless chucks. The Ultra-Dex drill index is weatherproof, watertight, and unbreakable.

• Cryogenic treatment creates a more uniform "grain” structure by transforming retained austenite into martensite.
• Modifies the carbon micro-structure through precipitation of carbides increasing resistance to wear.
• Nitride process diffuses nitrogen into the surface to create a case hardening resulting in superior tool life and exceptional corrosion resistance.