【Professional Diamond Drill Bit】 Made of selected high-strength carbon steel and equipped with a diamond-coated drill, providing excellent cutting capacity, rust resistance, durability, high torque, and long service life. 【High-Quality Hole Drilling】 The diamond coating increases drilling speed and results in a sharper drill. The pointed design reduces resistance and makes drilling more efficient, helping you create a smooth, precise, round hole. A round chip hole on the side keeps the drill clean at all times. 【Ideal for】 Specifically designed for drilling in porcelain, glass, marble, ceramics, stone, granite, and more. 【Usage Tips】 Start by cutting at a 45° angle, create a notch by positioning the drill, then slowly raise the hole cutter and drill at a steady speed. Additionally, keep the drill moist during drilling to prevent overheating. 【Buy with Confidence】 If you have any questions, please do not hesitate to contact us. We will do our best to solve them for you. (Please clamp the workpiece in the correct position and take necessary protective measures when processing the workpiece).