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.

• Always wear eye protection.

• Always wear hearing protection.

• Consider impact protection.