Diamond Hole Saw Cutter Drill Core Bit for Marble, Granite,

- Made from high quality silicon carbide, high hardness and wear resistance - Neat and smooth drilling, no broken edges, no shaking and chips easily, it can be used for precision drilling. - Low resistance to engraving - Stable drilling and no breakage, which greatly improves its efficiency - Guided by the circular rim, one may drill any circle arch in any direction, ideal for drilling flat bottom holes, perforated holes or overlapping holes. - Great for making clear and accurate holes on glass, tiles, granite and marble - Rod diameter: 9 mm / 0.35 inches. - Total length: 140 mm / 5.5 inches. - Drilling depth: 60 mm / 2.4 inches. - Open hole diameter hole saws: 33 mm/53 mm/63 mm/73 mm.