Jalleria offers a set of diamond tile drill bits consisting of: 6 tile drill bits, including carbide drill bits, a 6mm yellow tile drill bit (pre-drilled), and 5mm tile drill bits, 1 x 6mm, 1 x 8mm, 1 x 10mm and 1 x 12mm. NOTE: The yellow drill bit (pre-drilled) cannot be used; it only serves as an auxiliary tool for pre-drilling and should not be used for a long time, as it may be easily damaged. For efficient and beautiful drilling, it is necessary to replace the blue drill bit after use. Use the yellow drill bit to extend the life of the drill bits and improve their efficiency. APPLICATION: The procedure is: First, mount the yellow drill bit on the drill. Hold it in your hand and tilt it to the correct angle. Hold it at a 45-degree angle and quickly rotate it on the surface of the material. Then replace it with a blue diamond bit of the appropriate size and lightly drill into the material. It is recommended to add water when drilling to cool the bits and extend their life. These