#20 x 12" Cobalt Aircraft Extension Drill Bit BoltsandNuts.com Shank Size 31/32"

Shank Size 31/32"

They are designed to perform in a broad range of mateirals in the iron and steel families

Flute Length 145

Part Number D/ACO37/64

Part Number MMO3/16-2FSE

#20 x 12" Cobalt Aircraft Extension Drill Bit BoltsandNuts.com Shank Size 31/32"Product Description Cobalt drill bits are are effective in drilling tough, high tensile strength materials such as cast iron, inconel, stainless steel and titanium. They display high red hardness, permitting speeds up to 30% greater than with conventional M2 high speed steel. They have a 135 split point tip for fast penetration and accurate drilling. Compared to a conventional 118 degree tip, these drills wont go "walking" on you. Ideal for drilling