Brazing Process & Durable: Our diamond hole saws uses advanced brazing technology to firmly weld lengthening & thickened diamond particles to the saw blade, ensuring that the saw blade is not easily detached during the cutting process. Its durable characteristics provide guarantees for high-precision cutting, powerful cutting speed, and drilling stability Dry & Wet Dual Use Design: All diamond tile hole saws are treated with special high-temperature resistant brazing technology. The hole saw has large clearance holes, which facilitate rapid cooling and dust removal during the cutting process. You can directly dry drill or add water as a coolant to extend the service life of the hole saw One Set Is Enough: Our 8 PCS diamond core drill bits set 1/4"(6mm), 5/16"(8mm), 3/8"(10mm), 3/4"(19mm), 1"(25mm), 1-3/8"(35mm), 2"(51mm), 2-1/2"(65mm) can complete all drilling work for tiles, marble, artificial stone, and granite; The 4/5"(20mm) diamond finger bit used for enlarging, ream, cleaning rough holes or repairing edges; The 2"(50mm) beveling chamfer bit can be used for enlarging, shaping, polishing, cleaning, trimming, precision machining, rounding or chamfering existing rough holes Suitable For Multiple Machines: The diamond core drill bits kit is suitable for angle grinders with 5/8"-11 thread. Suggested working speed is 6000RPM; The maximum speed is 11000 RPM. This kit is equipped with an SDS 5/8 "-11 shank adapter that can be used to connect to handheld drills and bench drills. Please ensure that the drilling speed is not less than 2000RPM Widely Applicable Scenarios: This diamond hole saw set is suitable for various materials such as tiles, marble, granite, bricks, stones, etc., meeting your diverse cutting needs and making your cutting work more effortless Diamond Hole Saw Tile Drill Bits, 11 PCS Tile Core Drill Bits Set 6/8/10/19/25/35/51/65mm+50mm Diamond Chamfer +20mm Diamond Finger Bit+SDS Adapter Hollow Drill Hole Saw for Tile, Ceramic, Granite