General description The 50Pcs Diamond Coated Drill Bit Set is designed for precision drilling in various materials such as tile, glass, ceramics, porcelain, and marble. This set features diamond-coated bits that ensure smooth cuts with no broken edges, making it ideal for clean and accurate hole creation. Technical specifications Cutting hole diameter: 6mm / 0.23 inch Length: 5cm / 2.5 inch Material: Diamond + Metal Color: Silver Measurement allowed error: +/- 1-3cm Installation Mark the start of the hole with a pen and keep the area wet with water or coolant. Start drilling at a 45-degree angle, then transition to a vertical position once the hole has begun. Use low drill speeds and minimal pressure to ensure effective drilling. Slow down the drill speed when exiting the hole or drill from the opposite side to prevent breakthrough. Usage Ideal for drilling through glass, tile, porcelain tile, ceramic tile, brick, and light stone. Water is required to cool the drill bits during use to