Features & Details 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 saw. 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 6 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 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.