9 Best Drill Bits For Granite in 2026

Built-in cooling wax allows these bits to dissipate heat effectively during use, which means you can drill hard materials like granite without stopping frequently to prevent overheating. This engineering, paired with a centering pilot drill that locks onto marked positions, helps prevent skating on smooth surfaces like glass. The set includes multiple sizes from 3/16 inch to 1/2 inch, and the vacuum-brazed diamond grit on a high-carbon steel body is designed for wear resistance. For someone working with ceramic, glass, and granite, this kit provides a range of tools in one package.

These bits are specifically designed for hard materials like ceramic, glass, and stone, and are not suitable for drilling steel, wood, or metal. The NOBVIAM 6-piece set is another option for drilling similar materials. The Tolvaxo set’s cooling design and the included storage case help organize all ten pieces, which can be useful when working on a project that uses different materials.

Optimized for hard materials like porcelain and granite, the Bosch PTBX05 set is built for fast, precise work, so you can move through tile installations efficiently. Its carbide tip offers up to 5X more life compared to other Bosch bits, meaning these tools can handle multiple projects without wearing out quickly. An arrow-shaped head design delivers faster drilling with less effort, which reduces wear and tear on the bit during use. A universal hex shank provides a secure connection in both impact drivers and standard drills, allowing for maximum torque transmission and cleaner holes.

The trade-off is in scope. With only five bits and a max size of 5/16 inch, you’re covered for standard fixture installations but not for running larger pipes or drains. For those bigger jobs, you’d need to step up to a diamond hole saw kit like the WORKEASE 18-Piece set. The Bosch bits excel at precision, not diameter. Think of them as your go-to for faucet handles and towel bars, not for sink drains.

This set includes ten diamond hole saws ranging from a quarter-inch to just over an inch, providing a wide selection for various plumbing, electrical, or tile installation tasks. The bits are made from nickel-plated carbon steel to resist corrosion and are coated with diamond grit for drilling hard materials like granite and marble. The included instructions recommend keeping the bit lubricated with water during use to extend its life and improve the drilling process.

The trade-off is the mandatory wet drilling. You must keep adding water, which is great for bit life and dust control but adds a step compared to a dry-use bit like the Tolvaxo set. It means setting up a drip system or pausing to spray, so it’s less convenient for quick, overhead, or indoor jobs where water is a hassle. For controlled shop or outdoor work where you can manage the mess, this set’s variety is hard to beat. For totally dry, grab-and-go holes, you’d look elsewhere.

The double suction cup guide provides a key advantage for drilling hard materials like tile and glass. It grips tightly on clean, flat surfaces to lock the bit’s starting point, which prevents the diamond grit from skating across a glossy granite surface. With 18 bits from 6 to 50 mm, the kit covers common hole sizes for faucets, drains, and pipe pass-throughs in bathroom or kitchen projects.

The suction guide’s effectiveness depends on a flawlessly clean and flat surface, as any grout line or texture can break the seal. Compared to a basic set like the Tolvaxo 10-Piece Dry Diamond Drill Bit Set, this kit includes a positioning system. For work where precision on the first try matters, the guided system offers an advantage.

The inclusion of a dedicated EVA positioner is what sets this kit apart for drilling hard stone. That guide jig creates a waterproof seal and clamps the bit securely, which is critical for preventing the drill from skating across a polished granite surface and ruining the workpiece. With 15 sizes from 1/4 inch up to 2 inches, it’s a comprehensive set for someone who needs to run plumbing, electrical, or mounting hardware through tile and stone regularly. The vacuum brazed diamond segments and dry/wet capability mean it’s built to handle the heat and abrasion of serious use.

This 15-piece set covers a wide range of common plumbing and fixture installation diameters, from 1/4 inch up to 2 inches, so you’re equipped for a variety of jobs without needing multiple kits. For simple tasks requiring only a few small bits, like the Tolvaxo 10-piece set, a smaller collection might be more straightforward. However, if your work involves installing faucets, drain lines, or toilet flanges in hard materials, the included sizes and the EVA positioner help ensure accurate, clean holes on the first try.

This six-piece set includes five diamond core bits and one carbide-tipped bit, providing a lightweight kit for common DIY drilling on materials like tile and granite. The diamond grit is bonded to a steel body using vacuum brazing for smoother cutting, which helps create cleaner holes with less chipping on brittle surfaces when you use water cooling. Its round shank fits most standard drill chucks, making it a straightforward choice for corded or cordless drills.

The set offers a practical number of bits for home repair projects, though it contains fewer pieces than some other kits, such as the 18-piece WORKEASE set. It is suitable for drilling holes in porcelain, ceramic, glass, and stone when used within the recommended 1,600 to 5,000 RPM range and without hammer mode. For a homeowner tackling a handful of tile or countertop jobs, this focused collection can meet the need without the complexity of a larger professional arsenal.

The built-in wax cooling is the standout feature here. It allows you to drill into hard granite without the constant need for an external water source, which is a significant time-saver on a jobsite. This makes the set a solid choice for installers or DIYers who need to make clean, quick holes in stone or tile and want to avoid the mess of a water setup. The diamond grit, applied with a vacuum brazing process, should provide a good cut speed from the start.

The major trade-off is the limited diameter selection. Every bit in this 10-piece set is 6mm, so you’re buying multiple copies of the same size. If your project requires a variety of hole sizes, like for different pipe or cable runs, you’ll need another set. For a more versatile range of diameters in a dry-drilling format, the Tolvaxo 10-piece set includes bits from 3/16 inch up to 1/2 inch.

The carbide tip’s ability to withstand high heat and impact means this set can start fast and last through a mix of tile, masonry, and even wood or metal. That makes it the right grab for a contractor or serious DIYer who needs one bit to jump between different materials on a job site, without stopping to swap tools. You get strength and reliability for precise holes across the board, not just in stone.

This five-piece set is built for versatility, with a carbide-tipped design that Diablo states is made for faster starts and longer life in tile, masonry, concrete, wood, and metal. Its multi-material capability means you can switch between drilling a concrete block and a wood stud without changing bits, which saves time on mixed-material projects. For drilling many holes in a single, highly abrasive material like granite, a dedicated diamond bit set is typically the specialist’s choice.

This kit stands out for granite work because it includes a finger milling bit and a beveling chamfer bit. These aren’t just hole saws; they’re tools for refining and finishing, which is critical when a chipped edge on an expensive slab isn’t an option. For a contractor installing a kitchen faucet or a dedicated DIYer crafting a custom countertop, this 15-piece collection means you can drill, enlarge, and polish a hole to a pro-grade finish without switching to another system. Its vacuum-brazed diamond construction and debris-clearing design are built to handle granite’s abrasiveness without burning out the bit.

This kit specializes in creating larger, finished openings rather than small pilot holes. While other sets like the Tolvaxo focus on bits as small as 3/16″ for anchor holes, the DAYDOOR set contains core bits up to 4 inches in diameter. Its vacuum brazed diamond construction is engineered for tough materials like granite and porcelain, delivering a complete solution for professional-looking results directly from its organized storage case.