Precision Twist Drill 5999995 R15 Cobalt Steel Jobber Drill Bit Set 15-Piece

The Precision Twist Drill 5999995 is a 15-piece R15 Cobalt Jobber Drill Bit Set engineered for high-performance drilling in tough materials. Made from M42 cobalt high-speed steel (HSS-Co), these drill bits deliver superior heat and wear resistance compared to standard HSS bits, making them ideal for drilling stainless steel, cast iron, hardened alloys, titanium, and other hard metals.

Key Features:

• M42 Cobalt Steel Construction – 8% cobalt content provides exceptional hardness and red-hardness for extended tool life
• 135° Split Point Tip – Self-centering design reduces walking and eliminates the need for a center punch
• 15-Piece Jobber Length Set – Includes a graduated range of drill bit sizes for versatile use
• Bronze Oxide Finish – Reduces friction and helps dissipate heat during drilling
• Heavy-Duty Index Case – Clearly labeled, durable storage case keeps bits organized and protected
• Precision Ground Flutes – Ensure efficient chip evacuation and smooth cutting performance
• Made in the USA – Manufactured to strict tolerances for professional-grade accuracy

The Precision Twist Drill R15 cobalt set is a go-to choice for machinists, fabricators, and maintenance professionals who demand reliable performance on difficult materials. Whether used in a drill press or hand drill, these bits maintain sharp cutting edges longer than standard high-speed steel, reducing downtime and replacement costs on the job.