The high-quality diamond hole saw is made of high carbon steel, with a clean and fast opening and no broken edges. The incision resistance is small, the drilling is stable, and it will not break through the boundary. A well-designed center guide hole and side hole help to easily remove waste; Diamond drill bits have golden paint to prevent rust and improve surface corrosion resistance. Widely used diamond drill bits can be used for drilling hard materials such as tiles, marble, glass, granite, and concrete. Suitable for all electric drills and hammer drills. It is your ideal choice for DIY projects and home maintenance and repair. Please note that when cutting hard materials, it is important to ensure that the drill bit remains cool to prevent damage to the material to be drilled and premature wear of the drill bit. Lubrication with water is required during drilling, which can extend the lifespan of the drill bit.