High-quality material: Diamond drill bits are made of industrial-grade high-strength carbon steel with a nickel-plated surface, which effectively resists corrosion and rust. The diamond surface coating of the drill bit, with a thick and uniform coating, improves wear resistance and extends the service life of the hole opener. Precise positioning: Compared to conventional glass hole saws, our hole saws feature positioning aids. The pilot drill in the center can help you position accurately, ensuring the hole does not slip or get stuck, and assists in cutting precise holes. Cutting effect: The diamond surface coating adopts the sintering process. The cutting edge contains diamond particles from the inside out to ensure the cutting edge is always sharp. Low cutting resistance and stable drilling produce high-precision, smooth cuts without broken edges for optimal cutting results. Stress Relief Design: The cutting head of our diamond drill bit features a notch design with side through holes that facilitate the entry of cooling water and ensure that chips and other particles escape from the drilled hole during operation. The hole can be drilled. The process is more convenient and efficient. Versatile: 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, tiles, limestone, slate, marble, pumice, and fiberglass.