Product DescriptionMaterial: EmerySize: 50*3mmColor: SilverQuantity: 15 pcsPackage Contents: 15 pcs * Glass Hole Opener<br >1.Wide range of applications: Ceramic tile drill bits are for everyone. Suitable for electric drills. Widely used in glass, ceramic tiles, ceramics, tiles, jade, marble, rosary, granite, etc. Not suitable for tempered glass, concrete or concrete with a depth greater than 1/2. The advantages of tile drill bits are easy positioning, low cutting resistance, shaking, and ideal opening effects.2. High quality The tip of the diamond drill bit is made of nickel-plated high speed steel and has a 80-100 grit diamond coating. It has good wear resistance, high hardness, sharpness, high quality and long service life.3. Fast Cutting: The diamond hole saw blade is coated, sharp, high precision, smooth cutting, no bending, easy For a clean and precise hole, the center pilot hole and side holes help eliminate waste.< br>4. Usage The hole saw glass drilling tool set is used with all electric drills and impact drills. Keep the speed between 800-1000 per minute. Add water to keep the drill cool. Dry drilling is strictly prohibited.5.Packaging: You will receive 15 pieces tile hole saws, the size is 3mm, the quantity and size can meet your daily needs.