【ACCURATE POSITIONING】: Compared with traditional glass hole saws, our hole saws have positioning aids.The pilot drill in the center can help you position yourself accurately, ensure that the drill does not slip or get stuck, and helps you drill precise holes. 【CHIP REMOVAL DESIGN】: Our diamond drill bit cutting head adopts a notch design with passage holes on the side, which facilitates the entry of cooling water and ensures that chips and other particles escape from the hole duringthe operation, so that the hole can be drilled.The process is more convenient and efficient. 【CUTTING EFFECT】: Diamond surface coating adopts sintering processing method.The edge contains diamond particles from the inside out to ensure the edge is always sharp.Low cutting resistance and stable perforation create smooth, high-precision cuts without broken edges for optimal cutting results. 【HIGH QUALITY MATERIAL】: Diamond hole saws are made of high carbon steel.High tensile strength of industrial grade 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. 【WIDE APPLICATION】: The diamond drill bit is suitable for cordless drills, lithium drills and bench drills.Widely used for cutting precise holes in glass, ceramics, porcelain