【High-quality materials】The diamond hole saw is made of high-carbon steel with a clean, smooth opening, without broken edges. Low indentation resistance, stable drilling, and no broken edges. 【Good design】The central and lateral pilot holes help easily remove residue; the diamond tip has gold-plated paint to prevent rust, improving surface corrosion resistance. 【Wide application】Diamond bits can be used for drilling ceramic tile, marble, glass, granite, concrete, and other hard materials. They work with all electric drills and impact drills. It is the ideal choice for DIY projects and home maintenance and repair. 【Note】When cutting hard materials, it is important to keep the cutter cool to avoid damage to the material being drilled and premature wear of the cutter. Water is needed for lubrication during drilling, which can extend the life of the bit.