Concrete hole saw is made of carbide, which has the characteristic of high hardness, wear resistance, good toughness, heat and corrosion, providing a longer service life.The center drill bit of the hole saw set ensures precision and control, facilitates accurate positioning of the hole, and avoids any displacement or misalignment. Special angle three-layer cutting edge design can drill fast and efficiently, providing efficient cutting performance on a variety of materials, can be used for dry drilling without the need of water.Masonry hole saw kit is great to drill on a variety of materials, suitable for cutting opening holes for brick, concrete, cement, and stone, and creating openings on walls for air conditioning holes, pipe holes.