- Constructed of M-42 8% cobalt high speed steel for super abrasive resistance in tough metals
- Heavy-duty spiral flute design produces faster chip ejection
- Shorter cutting tips reduce torque for drilling in high tensile strength materials
- 135-degree split point reduces feed pressure for easier penetration without work hardening
- Ideal for use with screw extractors
![Irwin Left-Hand Mechanics Length Cobalt High Speed Steel Drill Bits, 7/16", Split, #IR-30528 (6/Pkg) Irwin Left-Hand Mechanics Length Cobalt High Speed Steel Drill Bits, 7/16", Split, #IR-30528 (6/Pkg)](https://cdn11.bigcommerce.com/s-gdy1ehz/images/stencil/500x659/products/259095/456824/Untitled_design_-_2023-02-13T163617.229__42564.1676327787.jpg?c=2)