• Extreme durability - thicker web provides greater strength and longer life Fast, accurate drilling - 135 deg split point tip starts on contact to prevent walking, while the parabolic flute clears chips fast Reduced slipping - 3-flat Secure-Grip™ shank holds the bit firmly in the drill chuck Versatile - reduced shank diameter for use in 3/8 in chucks Corrosion-resistant - black oxide coating provides lubricity and resists corrosion of the bit

Milwaukee® Thunderbolt® black oxide jobber length drill bits are designed for extreme durability and long life. The Thunderbolt® web features a thicker core than a standard drill bit to provide ultimate strength and protect against side-load breakage. A specially designed parabolic flute form clears chips and debris fast to keep the bit cool. The 135 deg split point tip delivers a precision start and prevents walking for fast, accurate holes. Effective for drilling on curved surfaces, Milwaukee® Thunderbolt® black oxide bits require less effort to drill through metal, wood and PVC and are highly recommended for use with portable drills. The package includes 12 bits.