#11 x 12" Cobalt Aircraft Extension Drill Bit BoltsandNuts.com • Size is marked both

• Size is marked both with a high-visibility laser marking and a permanent stamped marking that won't wear off • Triple square (XZN) S2 steel bit tip is machined to precise tolerances for strong engagement with fastener heads • Two-piece design allows bit and socket to be optimized separately

Pieces in Set 2

Part Number KFDMM13

Part Number CTC5-530-181

#11 x 12" Cobalt Aircraft Extension Drill Bit BoltsandNuts.com • Size is marked bothProduct 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