【Precise Positioning】: Compared with traditional glass hole saw, our hole saw has a positioning aid. A pilot drill in the center helps you position accurately, ensures that the drill bit does not slip or get stuck, and helps you drill precise holes. 【Cutting Effect】: The diamond surface coating adopts sintering treatment. The cutting edge contains diamond particles from the inside to the outside, which ensures that the cutting edge is always sharp. Low cutting resistance and stable drilling achieve smooth and high-precision cutting without edge breakage for optimal cutting results. 【High-quality Material】: The diamond hole saw is made of industrial-grade high-strength carbon steel with a nickel-plated surface, which effectively prevents corrosion and rust. The diamond surface coating of the drill bit is thick and uniform, which improves the wear resistance and service life of the hole saw. 【Chip Removal Design】: Our diamond drill bit adopts a notch design with side clearance holes,