General description FLITI Diamond drill bit set includes six high-quality diamond tile drill bits designed for efficient drilling in various materials such as tiles, glass, granite, and marble. The set features drill bits of sizes 5mm, 6mm (yellow carbide pre-drilled), 8mm, 10mm, and 12mm, ensuring versatility for different drilling needs. Technical specifications Sizes included: 5mm, 6mm, 8mm, 10mm, 12mm Material: Diamond-coated Special feature: Yellow drill bit is pre-drilled and designed for auxiliary use only Installation Install the yellow drill bit on the hand drill. Tilt the drill at a 45-degree angle and rotate quickly on the material surface. Replace with the appropriate size blue diamond drill bit for continued drilling. Usage Recommended to add water while drilling to cool the drill bits and extend their service life. Blue diamond drill bit contains cooling wax that absorbs and dissipates heat during use. Other information Compatible with hand drills, angle grinders, and