Heavy duty construction made to Type J aircraft specifications. Used for drilling holes in hard tough materials such as stainless steel titanium high temperature and high strength alloys. High red hardness of cobalt permits speeds 30% greater than HSS drills.
- Sizes: Fractional
- Material: Cobalt
- Finish/Coating: Bronze
Drillco 500A121 21/64, Cobalt Jobber Drill Heavy Duty
