Jintian Square Shank Four-Flute Rotary Hammer Drill Bit Concrete Rebar Drilling 6x140mm Cross Four-Blade [Square Shank]

Made from high hardness YG8C alloy, using imported virgin raw materials for superior wear resistance and durability compared to recycled alloys.

Purple copper welding at drill body joint with higher melting point (1200°C) than common brass welding (750-800°C), preventing tooth loss and ensuring stable performance under high temperature.

Drill head thickness up to 2mm with wear-resistant and thickened design.

Surface treated with sandblasting technology for enhanced coating adhesion, corrosion resistance, wear resistance, and rust prevention.

Designed for fast and efficient drilling in multiple materials including concrete, marble, granite, brick walls.

Not suitable for reinforced concrete or walls containing steel bars.

Capable of continuous drilling up to 200 holes (actual performance depends on operation, drill size, and material).

Does not easily lose teeth, jam, or break during drilling.

Round shank suitable for imported round-shank electric hammers and domestic light electric hammers.