The Bihui M14 Dry Drills Diamond Hole Saw 8mm (BU-DBDF08) is a high-precision, diamond-coated drill bit designed for dry drilling small holes in hard materials such as porcelain, ceramic, granite, and marble. Ideal for professional tilers, plumbers, and contractors, this tool is perfect for creating small, accurate holes necessary for installations like anchors, screws, and wall plugs in tile and stone surfaces.