20mm Diamond Hole Saw with Centering Guide Drill Bit, Tile Hole Saw, Diamond Core Drill Bit for Drilling Glass, Tiles, Ceramics, Marble, Granite

High-quality material: These diamond hole saw bits feature a high-quality diamond coating. The body is made of industrial-grade, high-strength carbon steel, and the surface is nickel-plated to ensure high hardness, rust and corrosion resistance, increased strength, and durability. Diamond hole saw dimensions: cutting diameter: 20 mm, cutting depth: 40 mm, overall length: 70 mm, triangular shank diameter: 9.5 mm. Ultra-efficient chip evacuation design: The U-shaped teeth and evacuation holes help dissipate heat and remove dust, while the large side holes facilitate water cooling and chip removal. A thick, uniform diamond coating provides excellent cutting edges, and the low cutting resistance and drilling stability ensure precise, clean cuts. [Easy to use and versatile]: Use the included drill bit and positioning bit to mark the hole location. Once positioned, remove the bit and drill the hole directly with the diamond hole saw. Note: Remember to add water or coolant during cutting to prolong the life of the diamond hole saw.