Details
Drillco® Nitro Heavy-Duty Mechanic's Length Drill Bit Set
- Manufactured from a premium grade of M-7N molybdenum high speed steel
- The Nitro Heavy-Duty 135° Split Point Drill with a Nitride surface treatment that gives 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