#13 x 12" Cobalt Aircraft Extension Drill Bit Hex Shank Black & Gold Super hard titanium nitride surface

Super hard titanium nitride surface treatment improves drill life

Black oxide surface resists abrasion and improves chip flow

high-tensile strength materials such as aluminum

reducing walking and ensuring cleaner holes

Built to stay sharp under heat and pressure

#13 x 12" Cobalt Aircraft Extension Drill Bit Hex Shank Black & Gold Super hard titanium nitride surfaceDescription The M35 Cobalt Drill Bit is an extra long drill bit designed for drilling tough materials like stainless steel, Inconel, and titanium. It has a 135 split point tip for fast and accurate drilling and is manufactured to Aerospace Standard 907 for superior quality. The drill bit has a round shank that works with a wide range of tool holding systems. It displays high red hardness, allowing for speeds up to 30% faster than conventional M2 high