#39 x 12" Cobalt Aircraft Extension Drill Bit Shopify Collective Internal Diameter: 7/16"-20

Internal Diameter: 7/16"-20

Part Number DWCF352-CC

Stamped Markings – Permanently impressed into the material by a roll-stamp die and as large as possible while still being clearly visible along the socket's curved surface • Exterior and Interior Finishes – The chrome-plated exterior is highly corrosion resistant and wipes clean to a mirror finish

Depth: 12-1/4"

#39 x 12" Cobalt Aircraft Extension Drill Bit Shopify Collective Internal Diameter: 7/16"-20Product 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