Thunderbolt Black Oxide Drill Bit, 5/16 In., 2-pk.

The Milwaukee Thunderbolt Black Oxide Drill Bit is a two-pack of professional-grade jobber length bits designed for general-purpose drilling in wood, metal, and PVC. These bits combine a reinforced core with a black oxide coating to deliver durability, corrosion resistance, and consistent cutting performance across a wide range of applications, from furniture assembly to metal fabrication and portable drill work.

The black oxide surface resists rust and keeps the edge sharp through repeated use, while the thicker Thunderbolt core provides superior strength to protect against side-load breakage during heavy drilling. The parabolic flute form clears chips and debris quickly, keeping the bit cool and reducing the effort required to drill through tough materials. The 135-degree split point tip delivers a precision start with no walking, ensuring fast and accurate hole placement, even on curved surfaces.

Features and Benefits

• Reinforced Thunderbolt Core: Thicker than standard drill bits, the core resists breaking and provides ultimate strength under heavy use and side loads.
• Black Oxide Coating: Stays sharp longer and resists corrosion, extending bit life in demanding applications.
• 135-Degree Split Point Tip: Delivers precision starts with no walking, for fast and accurate drilling in wood, metal, and PVC.
• Parabolic Flute Design: Clears chips and debris quickly to keep the bit cool and reduce drilling effort.
• Jobber Length: Versatile length suitable for general-purpose drilling and portable drill work.

Specifications

• Brand: Milwaukee
• Model: 48-89-2711
• Diameter: 5/16 inch
• Quantity: 2 pieces
• Tip Style: 135-degree split point
• Flute Design: Parabolic
• Bit Type: Jobber length twist drill bit