#31 Nitro Heavy Duty Jobber Drill Bits 12 pack

Need a large quantity? Request bulk pricing here. #31 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 surface treated for maximum lubricity. Recommended for use in stainless steel and other hard metal drilling. Part # 480N031