Self-Cooling Diamond Dry Drill Bit, for Ceramic Tile Stone Glass Hard Materials (Not for Wood), Round Shank 5mm 6mm 8mm 10mm 12mm 14mm 16mm Feature Dry Drilling Design: Diamond Drill Bit integrated with high-quality cooling wax lubricant inside which melts while dry drilling and cools the cutting surface; No need to add water, which can effectively reduce the temperature of the drill bit and increase the service life of the drill bit. Unique Details: Diamond coating enhances the drilling speed; Side flutes help to remove debris and drill holes smooth and fast; Depth mark useful for precise project. Efficient Drilling: Original high-quality wax head material, thick brazing emery, great durability, sharper drilling and higher efficiency. Practical Hexagonal Shank Design: It adopts hexagonal universal adapter, which is suitable for all types of drills and is more practical. Wide Application: Can be used for ceramic tiles, ceramics, glass, marble, granite, quartz stone, agate, jade, crystal stone, microcrystalline stone, etc. Product Description: Do you have the following troubles when you punching? 1. Wires next to it,not safe to add water 2. Drilling at high altitude,inconvenient to add water 3. Glass/jade is slippery with water and cannot be punched. Choose us Self-cooling Diamond Dry Drill Bit to help you easily solve problem.Meet your actual needs Diamond Drill Bit integrated with high-quality cooling wax, dry drilling without water,Vacuum Brazed technology and high quality diamond grains provide high efficient working and long time performance. SPECIFICATIONS: Material: Brazed Diamond Size: 5mm 6mm 8mm 10mm 12mm 14mm 16mm Package Contents: Self-cooling Diamond Dry Drill Bit x 1PCS/7PCS(5mm 6mm 8mm 10mm 12mm 14mm 16mm) Note: Due to manual measurements, please allow slight measurement deviations. Due to the different display and lighting effects, the actual color of the item may be slightly different from the color displayed in the picture.