#13 x 12" Cobalt Aircraft Extension Drill Bit Quantity:1 Keystone Thumb

Keystone Thumb

Flute Length 4-3/16"

Part Number: Assortment Kit #5101395 Pieces

Flute Length 1-3/16"

Part Number: 75C1200HSBA325PL/PT

#13 x 12" Cobalt Aircraft Extension Drill Bit Quantity:1 Keystone ThumbProduct 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