Laser Welding Diamond Dry Drill Bit Core Drill Bit for Building Materials Drilling

Laser Welding Diamond Dry Drill Bit Core Drill Bit for Building Materials Drilling. Widely used in drilling of concrete and brick building materials, without the need for water cooling, with faster drilling, long service life, high concentricity, and no tooth loss. Received National Invention Patent and 2014 Science and Technology Award. Total length of drill bit: 286mm for selection or customization. Connection buckle types: M22, 5/8 "-11UNC, etc. for selection and customized.