31/64" x 12" Cobalt Aircraft Extension Drill Bit Quantity:1 • Two Size Markings –

• Two Size Markings – The size is marked in two ways on every socket—both as a high-visibility laser marking and a permanent stamped marking • Full-Length Socket Well – While the overall socket is a shallow length

Part Number GLBCOX65/16

They have a taper shank

Part Number DWDDL12X19/64

Part Number: 62C500HCSL9Y

31/64" x 12" Cobalt Aircraft Extension Drill Bit Quantity:1 • Two Size Markings –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