Type J Cobalt 12” Extension Aircraft Drills - Fractional

These fractional size  type "J" 12" long drills made from heat resistant cobalt steel are heavy duty construction for drilling high temperature and high strength alloys. They are furnished  with a 135 degree split point to NAS specifications. Treated with a bronze oxide for wear resistance and identification.

  • Manufactured to A.I.A. NAS-907 standards
  • High red hardness and abrasion resistant
  • Heavy-duty construction provides greater strength and rigidity
  • Designed for drilling tough and abrasive materials, high temperature alloys, stainless and heat-treated high-strength steels

These 12" long drills are designed for drilling holes in hard, tough materials such as stainless steel, titanium and other high strength alloys. The special P3 split point and wear resistant surface treatment on these cobalt aircraft style drills will provide long life in portable applications.