Jintian Tungsten M4 High-Speed Steel Twist Drill Bit 4.2mm High Hardness Drill for Iron Stainless Steel Straight Shank Hole Drilling

Suitable for drilling stainless steel, aluminum alloy, copper, mold steel, iron, galvanized pipes, plastic, and wood.

Multiple specifications available for household and industrial use.

Lengths and working lengths vary by specification.

Precision manufacturing ensures accurate positioning and efficient chip removal.

Manual measurement may have slight deviations within normal range.

Drill bits are cutting tools primarily for metal drilling; controlling speed is critical.

For hard or impurity-rich metals, reduce speed and use cooling for better performance.

Clear debris promptly when abnormal chip removal occurs during thick material processing.

Jintian is a trusted brand with uncompromising quality.

Continuous innovation and craftsmanship ensure sharpness, durability, and high precision.

Products are widely recognized for their professional-grade performance and reliability.