Drill America 3/16" x 6" Cobalt Aircraft Extension Drill Bit, GLBCO Series
Brand: Drill America
Effective in drilling tough, high tensile strength materials like stainless steel, inconel and titanium
135° split point tip prevents drill from walking
Round shanks allow use with a wide variety of tool holding systems
Gold oxide is a thinner oxide surface treatment than black oxide typically used to identify cobalt steel tools; performance is similar to uncoated tools
6" overall length for drilling where extra length for reach is required