#57 Nitro Heavy Duty Jobber Drill Bits 12 pack 10-24 x 1 1/2 #15 Aircraft Extension Drill Bits

#15 Aircraft Extension Drill Bits 12" Length Black Oxide - Pack of 6

Part # MS51957-13B

Part # 450T048

Part # NAS1351C48

#57 Nitro Heavy Duty Jobber Drill Bits 12 pack 10-24 x 1 1/2 #15 Aircraft Extension Drill BitsNeed a large quantity? Request bulk pricing here. #57 Nitro Heavy Duty Jobber Drills, High Speed Steel Pack of 12 Manufactured from a premium grade of M 7N molybdenum high speed steel. The Nitro Heavy Duty 135 degree Split Point drill with a Nitride surface treatment that give a hard protective layer to the drill (increases hardness without increasing brittleness) which is measurably harder than high speed steel. Body and clearance are gold and black