68mm diamond drill bit with centering guide, diamond coated tile drill bit, diamond drill bit for glass, tile, ceramic, marble, granite.

Superior Quality: Our glass hole saw with pilot drill is made of high-quality diamond, with a robust hardened steel body and nickel plating. This ensures high hardness, protection against rust and corrosion, and a long service life. Precise Pilot Drill Design: Each hole saw is equipped with a removable pilot drill. The diamond cutting head of the pilot drill ensures exceptional sharpness and durability, guaranteeing precise drill bit positioning for fast and safe drilling. Dimensions: Cutting diameter: 68 mm – Cutting depth: 30 mm – Overall length: 70 mm – Triangular shank diameter: 9.5 mm. Clean and Precise Holes: Thanks to the thicker diamond coating, these hole saws produce a clean groove and allow for precise, shallow holes without chipping smooth surfaces such as tile, glass, marble, granite, terrazzo, etc. Cutting depth: 30 mm. Easy to Use: It is simple to use and requires no special tools. Use the core drill bit with the pilot drill bit to position the hole. Remove the pilot drill bit after positioning, then drill the hole directly with the core drill bit. Note: Remember to use water or coolant during drilling to prolong the life of the diamond core drill bit.