The Milwaukee 48-89-2772 1/4 in. Thunderbolt Black Oxide Drill Bit is recommended for use with portable drills. This drill bit features a parabolic flute form to clear chips and debris to keep the bit cool, and the thick core offers protection against side-load breakage. The black oxide construction provides durability, and this drill bit is excellent for drilling on curved surfaces.
- Thunderbolt web, provides longer life and faster driller times
- Parabolic flute, clears chips faster
- Black oxide construction for durability
- 135-degree split point, precision start no walking