Milwaukee 5/16" THUNDERBOLT® Black Oxide Drill Bit (6 PK)

REINFORCED CORE TECHNOLOGY FOR ULTIMATE SIDE-LOAD RESISTANCE

The Milwaukee Thunderbolt Black Oxide series represents a significant advancement in jobber length bit geometry, specifically engineered to eliminate the common failure points found in standard high-speed steel bits. By utilizing the proprietary Thunderbolt web—a thicker, tapered core—these bits provide superior structural integrity that resists snapping under heavy side-load pressure. The 135-degree split point geometry is a critical professional feature, ensuring the bit bites into the material immediately upon contact to prevent walking, even on curved or uneven surfaces. For high-production environments, the parabolic flute design facilitates rapid chip evacuation, which significantly reduces heat buildup and extends the effective service life of the cutting edge.

• / Thunderbolt Web Design: Features a thicker core than standard bits to provide maximum strength and protection against breakage.
• / 135° Split Point: Delivers a precision start on contact, eliminating the need for center punching and preventing bit walk.
• / Parabolic Flute Geometry: Engineered to clear chips and debris quickly, keeping the bit cool and maintaining cutting efficiency.
• / 3-Flat Secure-Grip Shank: Prevents the bit from spinning or slipping within the drill chuck under high-torque loads.
• / Black Oxide Coating: Provides essential lubricity and corrosion resistance for long-term durability in harsh jobsite conditions.

WHAT'S IN THE BOX

(6) 5/16" Thunderbolt® Black Oxide Drill Bits (48-89-2836)