- Includes 1/16" to 1/2" sizes by 64ths and a reduced shank on bits larger than 3/8"
- Made from premium high speed steel with black and gold finish for added corrosion resistance
- Precision-ground geometry provides best-in-class hole size accuracy
- Turbomax tip eliminates "walking," starts drilling on contact, and stays sharp longer
![Irwin® Turbomax 3/8" Reduced Shank HSS Drill Bits, 7/16", #IR-73628ZR (3/Pkg) Irwin® Turbomax 3/8" Reduced Shank HSS Drill Bits, 7/16", #IR-73628ZR (3/Pkg)](https://cdn11.bigcommerce.com/s-gdy1ehz/images/stencil/500x659/products/256328/449935/73628ZR__01438.1669759502.jpg?c=2)