<p> 【PRECISE POSITIONING】: Compared to traditional glass hole saws, our hole saws have positioning aids. The pilot drill in the center helps you position the hole precisely, ensuring that 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 a consistently sharp edge. 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 high-strength, industrial-grade carbon steel, and the surface is nickel-plated, which is effective against corrosion and rust. The drill bit's diamond surface coating is thick and uniform, improving wear resistance and extending the hole saw's lifespan. 【Chip Removal Design】: The cutting head of our diamond drill bit features a notched design with side clearance holes, facilitating the entry of cooling water and ensuring that chips and other particles are expelled from the drill bit during operation, making drilling more convenient and efficient. 【WIDE APPLICATION】: The diamond drill bit is suitable for cordless drills, lithium-ion drills, and bench drills. It is widely used for cutting precise holes in glass, ceramics, porcelain, tile, limestone, slate, marble, pumice stone, and fiberglass.</p>