Dongcheng Twist Drill Bit Fully Ground Stainless Steel Special Drill Bit Metal Super Hard Steel Plate Alloy Drill Bit Steel Drill Bit 4.2mm

Powerful and efficient performance for fast and high-quality work

Expert and leading brand in Chinese electric tools

Strong and wear-resistant construction for durability

Rapid drilling capability

High-Speed Steel (HSS) for high hardness and long service life

Precision ground cutting edges for smooth drilling

Suitable for multiple materials including steel plates, stainless steel, aluminum alloy, copper plates, wood, and plastic

One drill bit for versatile use

Precision forged to resist rust and damage

Sharp and durable with strong impact resistance

Specially ground head with 135° standard double back angle for high impact toughness

U-shaped groove design for smooth chip removal, preventing clogging and ensuring efficient drilling

Produces clean and smooth holes with stable diameter

Smooth hole surface that resists contamination and dirt adherence