Core drill bit adopts H.E.D ≈λ★♣technology, combined with laβ©♣ser welding, the product is more efficie±≤γnt and safer to use! It is mainly used in build↔☆✔ings to drill holes in≠↔β' the wall when installing water, elecγ✔₽tricity, heating, ga♣≤↑αs, air conditioning, and pipes.∞↕✘ It is also for drilling and coring o​♣₹ f highways, airport runway≥£"÷s, bridges, tunnels and o<™•✔ther projects.