Jintian Two-Groove Two-Slot Electric Hammer Drill Bit High Hardness Concrete Rebar Drilling 8*160mm Flat Head [Round Shank]

Drill head

Original YG8C alloy (high hardness and wear resistance)

Drill body

National standard 40CR steel, high-frequency quenched

Welding material

High melting point purple copper (melting point approx. 1200°C)

Surface finish

Sandblasted coating for durability and corrosion resistance

Square shank

Four-groove design, compatible with domestic four-groove electric hammer drills

Round shank

Two-groove two-slot design, compatible with imported round shank and domestic light electric hammer drills

Diameter range

6 mm to 35 mm

Length range

110 mm to 500 mm total length

Ideal drilling depth

varies by model, e.g., 45 mm to 430 mm

Maximum drilling depth

varies by model, e.g., 50 mm to 440 mm

Square shank 6*110mm

Ideal depth 45 mm, Max depth 50 mm

Round shank 8*150mm

Ideal depth 95 mm, Max depth 105 mm

Square/Round shank 25*350mm

Ideal depth 280 mm, Max depth 290 mm

Square/Round shank 35*500mm

Ideal depth 430 mm, Max depth 440 mm

Longer service life due to thicker drill head (2mm vs. typical 1mm)

High impact toughness reduces drill breakage during use

High melting point welding prevents tooth loss under high temperature drilling

Sandblasted surface prevents coating wear and rusting during high-speed drilling

Wide compatibility with various electric hammer drills due to multiple shank options

Goldtol () drill bits are engineered for professional and industrial use, offering exceptional durability, wear resistance, and reliable performance in concrete drilling applications. The use of premium raw materials, advanced manufacturing processes, and thoughtful design ensures longer tool life and efficient drilling without common issues such as tooth loss, breakage, rust, or jamming.