People Electric Hammer Drill Bit Square Shank Four-Groove Wall Penetration Cement Concrete Wall Opening Construction Impact Drill Bit 10*150

Fast drilling, durable and not easy to break

Instantly penetrates concrete without tooth loss or jamming

Precision craftsmanship ensuring comprehensive durability

High hardness alloy drill bits with standard shank

Copper welding for wear resistance and thickened drill heads

Surface treated with sandblasting for enhanced wear and corrosion resistance, preventing rust

Not suitable for reinforced concrete or walls with steel bars

Drill bit body made of national standard 40CR steel, high-frequency quenching for impact toughness, wear resistance, and extended service life

Drill bits use original YG8C alloy raw material for higher hardness and wear resistance compared to recycled alloys

Copper welding uses high melting point purple copper (melting point 1200℃) instead of lower melting point brass to prevent tooth loss and melting during high-temperature drilling