68mm Hole Saw, with Central Guide Drill Bit, with Diamond Surface Coating for Cutting Glass, Tiles, Ceramics, Marble, Limestone

【PRECISE POSITIONING】: Compared to traditional glass hole saws, our hole saws have positioning aids.The pilot drill in the center helps you position yourself precisely, ensuring the drill bit won't slip or jam, and helping you drill accurate holes. [CUTTING EFFECT】: The diamond surface coating uses a sintering treatment method.The cutting edge contains diamond particles from the inside out to guarantee it remains sharp.Low cutting resistance and stable drilling create smooth, high-precision cuts without broken edges for optimal cutting results. [HIGH-QUALITY MATERIAL]: The diamond hole saws are made of industrial-grade, high-strength carbon steel with a nickel-plated surface, which is effective against corrosion and rust.The drill bit's diamond surface coating is thick and uniform, improving wear resistance and extending the drill bit's lifespan. 【CHIP REMOVAL DESIGN】: The cutting head of our diamond drill bit features a notched design with clearance holes on the side, facilitating the entry of cooling water and ensuring that chips and other particles escape from the drill hole during operation, allowing for efficient drilling.The process is more convenient and efficient.【WIDE APPLICATION】: The Flintronic diamond drill bit is suitable for cordless drills, lithium-ion drills, and bench drills.Widely used for cutting precise holes in glass, ceramic, porcelain, tile, tile, limestone, slate, marble, pumice and fiberglass.Flintronic Hole Saw with Center-Guided Drill BitMaterial: Carbon steelPackage: 1PC Drill, 1PC Hex shankInstructions: Start your hole diagonally, make a circular outline, then keep the drill bit straight.Tips:1. Please use at low drilling speed and low drilling pressure.2. Always use coolant (water) when drilling.3. Better with an electric drill (not included here).4. Please dry surface moisture and store after use.5. Not suitable for drilling in tempered glass, plastic and wood. Not suitable for concrete or more than approximately 1/2" deep.