These are the best value offering over three times more lifespan than uncoated HSS drills at a fraction of the cost of the more exotic sintered and solid bits. They are more suitable for use with hand tools than the super hard bits designed for bench tools.
- Drill out sheared shafts.
- Drill a shaft to use a T-piece.
- Drill out a damaged thread.
- Extends lifetime three times or better.
- Best quality/value combination.
- Sharpening will remove the coating.
- Consider tungsten carbide bits.