#30 x 12" Cobalt Aircraft Extension Drill Bit BoltsandNuts.com Each chisel is individually heat

Each chisel is individually heat treated to harden and strengthen the tip while maintaining the soft temper of the striking end

Shape Corner Rounding

This set includes diagonal cutters to snip wires

Part Number DWRR54

Part Number: EZ-EK50815

#30 x 12" Cobalt Aircraft Extension Drill Bit BoltsandNuts.com Each chisel is individually heatProduct 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