The Milwaukee 48-89-2730 3/8 in. Thunderbolt Black Oxide Drill Bit is excellent for drilling on curved surfaces and is recommended for use with portable drills. This drill bit features black oxide construction and a thick core for durability, and the parabolic flute form clears away chips and debris to keep the bit cool.
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Product Features:
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- Corrosion resistant: Black oxide coating provides lubricity and resists corrosion of the bit
- 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










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