PRECISE POSITIONING: Compared to traditional glass hole saws, our hole saws have positioning aids. The pilot drill in the center can help you position yourself precisely, ensure that the drill will not slip or get stuck, and help you drill precise holes. CUTTING EFFECT: Diamond surface coating adopts sinter processing method. The cutting edge contains diamond particles from the inside out to ensure that the cutting edge is always sharp. Low cutting resistance and stable drilling create smooth, high-precision cuts without broken edges for optimal cutting results. HIGH QUALITY MATERIAL: Diamond hole saws are made of high carbon steel. Industrial grade high strength carbon and the surface is nickel plated, which is effective against corrosion and rust. The diamond surface coating of the drill bit, the coating is thick and uniform, and the wear resistance and service life of the hole opener are improved. DIRECTIONAL DESIGN CHIPS: Our diamond drill bit cutter head adopts notch design with clearance holes on the side, which is easy for cooling water to enter and ensures that chips and other particles escape from the borehole during operation, so that the hole can be drilled. The process is more convenient and efficient. WIDE APPLICATION: The diamond drill bit is suitable for cordless drills, lithium drills and bench drills. Widely used for cutting precise holes in glass, ceramic, porcelain, tile, tile, limestone, slate, marble, pumice and fiberglass.