Irwin
- Constructed of M-35 5 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° split point reduces feed pressure for easier penetration without work hardening
1/2", 2-1/4" twist length, 3-3/4" overall length.