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A diamond hole saw for granite is the fastest and more economical way to drill holes in materials like granite, marble and other similar stone applications. ToolPlanet.com offers a large variety of quality stone core drill bits, granite core drill bits and marble drill bits. These bits are for use on a stone or granite drill or threaded drills and be screwed into an angle grinder. Each drill bit for stone is suitable for the most demanding drilling jobs. We sell diamond core drill bits for wet core drilling and dry core drilling applications. For assistance with an order, or to talk to an expert, call Tool Planet toll free at 888-535-8665.