The Milwaukee 9/16 in. Thunderbolt Black Oxide Drill Bit features durable black oxide construction. This drill bit is excellent for drilling on curved surfaces and recommended for use with portable drills. The thick core provides protection against side-load breakage.
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Product Features:
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- Extreme durability: thicker web provides greater strength and longer life
- Fast accurate drilling: 135° split point tip starts on contact to prevent walking while the parabolic flute clears chips fast
- Reduced slipping: 3-flat Secure-Gripâ„¢ shank holds the bit firmly in the drill chuck
- Versatile: reduced shank diameter for use in 1/2 in. chucks
- Corrosion resistant: black oxide coating provides lubricity and resists corrosion of the bit













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