15/64 Nitro Heavy Duty Jobber Drill Bits 12 pack 4 x 3/16 Part # 400N123

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15/64 Nitro Heavy Duty Jobber Drill Bits 12 pack 4 x 3/16 Part # 400N123Need a large quantity? Request bulk pricing here. 15 64 Nitro Heavy Duty Jobber Drills 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 surface treated