Drillco® Nitro Heavy-Duty Jobber Length Drill Bit Set, 29 Pieces, High Speed Steel Replacement Blade Bi-metal construction with 8% cobalt

Bi-metal construction with 8% cobalt for increased wear resistance

Made from oil resistant non-skid

Top read centre vial provides 300° viewing for easy readability

90° vertical indexing

Drillco® Nitro Heavy-Duty Jobber Length Drill Bit Set, 29 Pieces, High Speed Steel Replacement Blade Bi-metal construction with 8% cobaltManufactured 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 Specifications