#21 x 12" Cobalt Aircraft Extension Drill Bit BoltsandNuts.com Part Number: BIT-DMS73-5018

Part Number: BIT-DMS73-5018

Part Number: EZ-31270

Part Number: 75F550HCSSS

Part Number: BIT-KFDX

#21 x 12" Cobalt Aircraft Extension Drill Bit BoltsandNuts.com Part Number: BIT-DMS73-5018Product 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