Lytool 6pcs Dry Diamond Drill Bit Set - 5, 6, 8, 10, 12mm and 6mm Carbide Drill Bits. Ideal for drilling clean holes in hard materials. High-quality, high-temperature resistant diamond grit for efficient drilling. Filled with cooling wax, suitable for dry drilling. No cooling is required when drilling, as the drill bits are equipped with cooling wax inside. However, this can increase the life of the drill bits. Professional diamond drill bits for drilling porcelain, glass, hard ceramic tiles and slabs, porcelain, granite marble, quartz, limestone, fiberglass, terrazzo, masonry, and sandstone. High-quality, high-temperature resistant diamond drill bits provide efficient and clean drilling. Filled with cooling wax, suitable for dry drilling. However, to extend the life, it is recommended to use water or coolant. Diameter: 6, 8, 10/12 mm, handle diameter (mm) Use: Use a screwdriver to drill at a maximum angle of 30°. Then straighten the drill bit and complete a spinner. Wet the bit