Drillco 29 piece heavy-duty jobber drill set. The Nitro heavy duty 135 degree split point drill with 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 black and gold surface treated for maximum lubricity. Recommended for use in stainless steel and other hard metal drilling. Black oxide treatment adds lubricity and creates small pockets on the surface of the tool that act to hold coolant near the cutting edge.
- Nitro Jobber Drill Sets
- 29 jobber length drill bits ranging in sizes 1/16" to 1/2" in 1/64" increments
- High speed steel
- Black & gold finish
- Cat: Drills
- 135 degree point
- Straight shank