#31 x 12" Cobalt Aircraft Extension Drill Bit Shopify Collective Shank Size 43/64"

Shank Size 43/64"

Case Hardened Serrated Hex Flange & Large Flange Lock Nuts

Part Number: Assortment Kit #151

Flute Length 145

Length 5-1/4"

#31 x 12" Cobalt Aircraft Extension Drill Bit Shopify Collective Shank Size 43/64"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