General description CLEAN AND SMOOTH CUT: The 100Pcs Diamond Coated Drill Bit Set is designed to create precise and smooth cuts without broken edges. These drill bits are excellent for making clean holes in various materials, including tile, glass, ceramic, porcelain, and marble. Technical specifications Cutting hole diameter: 6 mm / 0.23 inches Length: 5 cm / 2.5 inches Material: Diamond + Metal Color: Silver Installation Use a pen to mark the beginning of the hole and keep it wet with coolant. Start drilling at a 45-degree angle, then align to 90 degrees as the hole forms. Drill at low speed and apply minimal pressure. Slow down speed for the exit hole or drill from the other side to avoid breakthrough. Usage Ideal for wet cutting of tiles, glass, aquariums, marble, ceramic, porcelain, bottles, and quartz sinks. Keep adding water while drilling to prevent overheating and ensure the longevity of the drill bits. Note: The electroplated diamond coating will wear off if the tool gets