# 1 of 4 Drill Bits in the set.
1/4" x 6" Cobalt Aircraft Extension Drill Bit
Bit #1 = 1/4" x 6" long Cobalt Drill Bit
- Ideal where extra length for reach is required
- m35 5% cobalt drills are are effective in drilling tough, high tensile strength materials like stainless steel, inconel, and titanium
- 135 degree split point tip for self-centering and reducing thrust. Compared to a conventional 118 degree tip, these drills wont go "walking" on you.
- Manufactured to Aerospace Standard 907
- Display high red hardness, permitting speeds up to 30% greater than with conventional M2 high speed