Precision Twist Drill 5999710 Letter R HSS Jobber Length Drill Bit

The Precision Twist Drill 5999710 is a Letter Size "R" High-Speed Steel (HSS) Jobber Length Drill Bit designed for precision drilling in a wide range of materials including steel, aluminum, copper, brass, and other metals. Manufactured by one of North America's most trusted drill bit brands, this bit delivers consistent, accurate holes in both professional shop and industrial environments.

Key Features:

• Letter Size R — equivalent to 0.339 inches (8.611 mm) diameter
• High-Speed Steel (HSS) construction for durability and heat resistance
• Jobber length design provides the ideal balance of rigidity and reach for general-purpose drilling
• 118° point angle for easy starting and accurate hole placement on most materials
• Right-hand cutting direction, compatible with standard drill presses, hand drills, and CNC equipment
• Precision-ground flutes for efficient chip evacuation and smooth drilling performance
• Manufactured to ANSI standards for consistent sizing and reliable fit

The Precision Twist Drill 5999710 is a dependable choice for machinists, fabricators, and maintenance professionals who require accurate, repeatable results. Its high-speed steel composition allows for use at higher cutting speeds than carbon steel alternatives, extending tool life and improving productivity.