*Key Features *STURDY & DURABLE MATERIALS - The cutting blade of the diamond hole saw is made from a premium grade of diamond that delivers more effective performance than traditional carbide or bi-metal hole saws. *EASE OF INSTALLATION - The diamond drill bits for ceramic should be connected to an angle grinder. Drill a pilot hole to begin your drilling to keep the saw from wandering from the desired hole location. *HIGH PERFORMANCE - The ceramic drill bits for pots feature holes on the body to ensure that filings can be removed effectively while the blades are rotating at high speed. *FINE PORTABLE CASE - The 8 pcs diamond drill bits come with a compact box where the bits are not in use. You don't have to worry about the missing of any of them. *WIDE APPLICATION - The core extractor ensures a clean and accurate hole on hardest and abrasive materials like tile, granite, marble, other stone, and porcelain. *Note: Wear gloves and a mask when using the machine. Remove dust particles with a cleaner during use. *Specifications Drill Bits Diameter: 20/25/40/45/50/68 mm (0.79/1/1.6/1.77/2/2.7 in) Blade Thickness: 1.4 mm (0.06 in) Blade Diameter: 125 mm (4.9 in) Mounting Thread: M14 Gross Weight: 1.7 kg (3.75 lb) Package Dimensions (LxWxH): 24x17x11 cm (9.4"x6.7"x4.3") *Package Content 1 x Tool Box 6 x Diamond Drill Bit 2 x Diamond Saw Blade