Type D: Cobalt Jobber Length Aircarft Drills Manufactured to A.I.A. NAS-907 standards 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
Similar to: Type J, except screw machine length flutes are better suited for portable drilling
Type D: Cobalt Jobber Length Aircarft Drills Manufactured to A.I.A. NAS-907 standards 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
Similar to: Type J, except screw machine length flutes are better suited for portable drilling