- High performance metal drilling for portable drill users, works well on curved surfaces
- Revolutionary tip design stays sharper longer and drills up to 10x faster than other leading drill bits
- High speed steel features a black body and gold flute
- Self-centering TURBOMAX tip for clean entry and fast startsstays sharp longer
- Three-flatted shank on 3/16" and above for better chuck grip
![Irwin® Turbomax High Speed Steel Straight Shank Jobber Length Drill Bits, 21/64", Carded, #IR-73321 (3/Pkg) Irwin® Turbomax High Speed Steel Straight Shank Jobber Length Drill Bits, 21/64", Carded, #IR-73321 (3/Pkg)](https://cdn11.bigcommerce.com/s-gdy1ehz/images/stencil/500x659/products/259924/396884/StanleyProductsTurbomaxHighSpeedSteelStraightShankJobberLengthDrillBits__07720.1611799721.jpg?c=2)