#14 x 12" Cobalt Aircraft Extension Drill Bit BoltsandNuts.com Each Tekton combination wrench is

Each Tekton combination wrench is permanently marked with a stamped size marking on both sides for easy identification

Tekton 1/4 inch drive shallow external star (E-Star) sockets are made from 50BV30 steel that's hardened to 40–47 HRC for strength and durability

Internal Diameter: 7/8"-9

Part Number: BIT-DWDCOK

Part Number DMS73-4014

#14 x 12" Cobalt Aircraft Extension Drill Bit BoltsandNuts.com Each Tekton combination wrench isProduct 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