Simplified Diamond Core Drill Bit Set for Porcelain Ceramic Tile Marble Granite

The package includes a total of 12 pieces, comprising 9 core drill bits in sizes 1/4''(6mm), 5/16''(8mm), 4/5''(20mm), 1''(25mm), 1-3/8''(35mm), 2''(50mm), 3''(75mm), and 4''(100mm). Additionally, it includes 1 finger milling bit of 4/5''(20mm) size, 1 beveling chamfer bit of 2''(50mm) size, and 1 SDS adapter.

These diamond-tipped core drill bits and accessories are suitable for dry or wet drilling of various materials such as porcelain, ceramic tile, marble, and granite. The beveling chamfer bit and finger milling bit can be used to shape, enlarge, and round the edges of existing holes.

The high-quality base steel and diamond components, combined with the vacuum brazed technology, provide enhanced efficiency and a longer working life for the drill bits. They can be used for both dry and wet drilling, with wet use further prolonging the working life and improving the drilling effect.

The package also includes an EVA mold positioner, which features a built-in sponge pad that can effectively fix the drilling position of the hole saw and assist in positioning, making the drilling process more accurate. The positioner can be easily removed by drilling a small slot. Additionally, the package comes with a carrying strap on the outside of an Oxford bag, making it convenient to transport.

For optimal performance, it is recommended to use a 5/8''-11 thread angle grinder. For drill bits up to 100mm in size, the recommended speed is 6000RPM, with a maximum speed of 11000RPM. For drill bits 100mm and above, the recommended speed is 3000RPM, with a maximum speed of 6000RPM. If you prefer to use an electric drill or other machines, the included SDS adapter can be utilized.

product information: