1803 5/16 in. High Speed Steel Aircraft Extension Drill Bit (6-Piece)

This High Speed Steel Heavy-Duty Jobber Length Drill features drills with right-hand direction of cut and was designed for drilling metal, wood and plastic. The drills were precision ground to tight tolerances with geometries that include a 135-degree split point to eliminate walking of the drills on the work-pieces and 3 flats on the shanks of drills above 11 in./64 in. for tighter chucking. This premium high speed steel drill set also has nitride black and gold treatment for increased hardness and tool longevity.

Superior rigidity in hand or machine drilling
6 in. aircraft extension drill for extra reach applications
135-degree split point eliminates walking and drills on contact along with requiring less force to push it also drills faster than a conventional pointed drill
Black oxide finish improves lubricity and allows the drill to run cooler and last longer
Made of premium high speed steel
Precision ground to tight tolerances
For drilling in carbon, alloy and cast iron steel