Yanyan Woodworking Countersink Drill Bit Reamer Pilot Drill Set 6pcs [2.8+3+3+3.2+3.5+4] 10mm

Available in 6 models to suit different needs.

Two-stage countersink design.

Center drill with spiral blade and sharp tungsten steel cutting edge for fast and smooth drilling.

Countersink blade made of wear-resistant alloy material, fully ground for sharpness and burr-free finish.

Drill body made of 45# steel with mirror polishing technology for durability and higher hardness.

Smooth shank diameter for stable operation.

Use short cutting edge tools to minimize vibration and deviation during processing, which can damage the tool and affect quality.

Prefer tools with larger shank diameters for better stability.

Designed specifically for handheld and benchtop woodworking engraving machines; not suitable for electric drills or drill presses.

Suitable for processing hardwood, softwood, and composite boards to achieve smooth surfaces.

Avoid processing metals such as copper and iron, as well as abrasive materials like sand and stone.

Use appropriate size collets; worn, non-round, or tapered collets cannot provide sufficient clamping force, causing vibration or tool breakage.

Replace collets immediately if uneven contact marks or grooves appear on the tool shank to prevent accidents.