2-1/4 Inch Diamond Hole Saw with Pilot Drill Bit, 2-1/4" Serrated Brazing Tile Hole Saw Diamond Core Drill Bits with Guiding Bit for Ceramic Porcelain Tile Glass Stone Granite Marble

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• 【Top Quality】Our Serrated diamond hole saw set is made of high-quality thickened diamond coating, solid hardened steel body, and the surface is made by premium brazing process to ensure its high hardness, rust-proof, anti-corrosion, strong and durable;
• 【Unique Serrated Tooth Design】The top of our hollow dril hole saw adopts a serrated cutting edge design to make it cut sharper. The multiple gaps between the cutting teeth not only make the cutting resistance smaller, but also greatly enhance the chip removal ability of the hole saw . Make cutting and drilling faster and more accurate.
• 【Accurate Positioning Pilot bit Design】Each tile hole saw is designed with a detachable Positioning pilot drill bit, The pilot drill bit is designed for precise positioning and easy operation, allowing anyone to easily drill holes in granite or tiles.
• 【Size】Cutting diameter: 2-1/4 Inch (57mm), Cutting Depth: 1-5/16 Inch, Shank Dia.: 3/8 Inch(9.5mm) , perfect for drilling tiles, ceramics, glass, marble and granite.
• 【Sharp & Clean Holes】This Multi-tooth diamond tile core drill bits with thicker diamond coating make the edge of the groove sharper, can cutting precise flat bottom holes with no chipping on smooth surfaces, such as ceramic tiles, ceramics, glass, marble, granite and terrazzo.
• 【Dual Uses for Dry & Wet Drilling】Our brazed diamond hole saw have undergone special high-temperature resistance treatment, so that they can be directly dry drilling without adding water as a coolant. But in order to extend the use of diamond drill bits, it is recommended to add water or other coolants during the drilling process.