The Milwaukee 48-89-2908 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, which provides ultimate strength and protects against side-load breakage. A specially designed parabolic flute form clears chips and debris fast to keep the bit cool. Excellent for drilling on curved surfaces, requires less effort to drill and is highly recommended for use with portable drills.
- Thunderbolt web, provides longer life and faster drilling times
- Parabolic flute clears chips faster
- 135-degree split point, precision start no walking
- 3-flat secure grip shank, reduces bit slipping in chuck