1-1/4" 4MT Cobalt Taper Shank Drill Bit Quantity:1 They are gold oxide surface

They are gold oxide surface treated

Internal Diameter: 1"-14

Part Number DWDDL18X27/32X1/2

We make our service wrenches from 4140 chromium molybdenum steel and harden them to 50–53 HRC

1-1/4" 4MT Cobalt Taper Shank Drill Bit Quantity:1 They are gold oxide surfaceProduct 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. Taper shank. Brand