21 Pieces Cobalt Drill Bit Set
This IRWIN Cobalt High-Speed Steel Drill Bit Set includes drill bits made of M-42 5% cobalt high-speed steel for super abrasive resistance in tough metals. The 135° split point reduces feed pressure for easy penetration without work hardening, while the heavy-duty spiral flute design produces faster chip ejection. These versatile drill bits come in a metal index case for easy transport and organization.
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- Up to 3/8 by 1/64ths.
- Constructed of M-42 8 percent cobalt high speed steel for super abrasive resistance in tough metals.
- Heavy duty spiral flute design produces faster chip ejection.
- Shorter cutting lips reduce torque for drilling in high tensile strength materials.
- 135-degree split point reduces feed pressure for easier penetration without work hardening.