10PCS Upgraded Diamond Drill Bit Set, Extended Ceramic Tile Drill Bits, Dry Diamond Drilling Milling Bit for Pots, Glass All-In-One Kit: Includes 5 extended diamond-coated drill bits, 5 eccentric drill bits, all 1/4" hex shank, and fits most cordless and corded drills, impact drivers, and electric screwdriversMaterial Compatibility: The diamond-tipped drill bit is suitable for ceramic, porcelain, glass, marble, quartz, and engineered stone. Not for wood, metal, plastic, or graniteUpgraded Diamond Bit: Combines drilling and grinding. The extended, ultra-wide diamond-coated head with high-density grit allows for deeper drilling and smoother grinding. Built-in cooling wax reduces heat and supports dry drillingEccentric Drill Bit: The four-edged bit design helps keep drilling steady and reduces slipping, while double U-shaped grooves help remove debris and control heat during drillingColor: BlueMaterial: MetalPackage Contents:1*Upgraded Diamond Drill Bit SetOnly the above package content, other products are not included.Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.