#57 Nitro Heavy Duty Jobber Drill Bits 12 pack 1/2-13 x 4 Part # 480N011

Part # 480N011

Part # BH031C300N

Part # 1180A003

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#57 Nitro Heavy Duty Jobber Drill Bits 12 pack 1/2-13 x 4 Part # 480N011Need 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