- Bit is constructed of M-2 high speed steel for the best combination of strength, heat resistance and wear resistance
- Revolutionary tip design stays sharper longer and drills up to 28 percent faster than other leading drill bits
- Three flatted shank on 3/16-inch and above
- Three-flatted shank design provides better chuck grip and reduces slippage. Ideal for use in keyless chucks
![Irwin 15-PC Cobalt HSS Drill Bit Sets, 1/16" - 1/2" Cut Dia., #63137ZR (1/Pkg) Irwin 15-PC Cobalt HSS Drill Bit Sets, 1/16" - 1/2" Cut Dia., #63137ZR (1/Pkg)](https://cdn11.bigcommerce.com/s-gdy1ehz/images/stencil/500x659/products/259244/451238/63137__55069.1670622628.jpg?c=2)
IRWIN Tools
Irwin 15-PC Cobalt HSS Drill Bit Sets, 1/16" - 1/2" Cut Dia., #63137ZR (1/Pkg)
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