Made in the USA, top quality. Drillco 1/16" 400N Series High-Speed Steel Nitro Heavy Duty Jobber Drill Bit, BlackOxide Finish, Round Shank, Spiral Flute, 135 Degree Split Point,  (Pack of 4)

*Heavy duty nitride surface treatment     increases hardness for drilling stainless steel and other hard metals. *High-speed steel (HSS) provides hardness for wear resistance. *Black Oxide finish resists corrosion and increases the hardness of the drill bit for additional wear resistance