Thunderbolt Drill Bits are designed for use with cordless and other portable drills.
- Thunderbolt web for increased strength
- Open flute design for efficient chip ejection
- Faster spiral for improved drilling times
- 135 split point tip starts on contact to keep the bit from walking for fast accurate holes
- 21-Piece Thunderbolt Black Oxide Drill Bit Set - 48-89-2801