Thunderbolt Twist Drill Bits

Milwaukee - 135° split point tip starts on contact to prevent walking, while the parabolic flute clears chips fast - educed slipping: 3-Flat Secure-Grip™ shank holds the bit firmly in the drill chuck -  Black oxide coating provides lubricity and resists corrosion of the bit - Reduced shank diameter for use in 1/2" chucks - 3" Flute Length - 1.1875 Decimal Equivalent