#47 x 12" Cobalt Aircraft Extension Drill Bit Quantity:1 Part Number: DUR029-95

Part Number: DUR029-95

The bits are made with tight tolerances for a secure fit in small screws

Part Number: EZ-SK20715

Part Number: DUR315B-95-15/LEG

The smaller flat end keys are made from 8660 nickel chromium molybdenum steel that's heat-treated to 54–58 HRC and the larger flat end keys are made from 6150 chromium vanadium steel that's heat-treated to 44–50 HRC

#47 x 12" Cobalt Aircraft Extension Drill Bit Quantity:1 Part Number: DUR029-95Product 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