5/16 Nitro Heavy Duty Jobber Drill Bits 6 pack B1/2-20 x 3/4 Part # MS51958-64

Part # MS51958-64

Part # MS51959-74

Part # MS90725-24

Part # NAS1352C0810

Part # BH063F250N

5/16 Nitro Heavy Duty Jobber Drill Bits 6 pack B1/2-20 x 3/4 Part # MS51958-64Need a large quantity? Request bulk pricing here. 5 16 Nitro Heavy Duty Jobber Drills Pack of 6 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