Feature:1. Vacuum Brazing Technology: Increases the resistance of the drill bit to temperature and friction, makes the particles better adhere to the core steel, and improves the performance and service life.2. Easy Drilling: The drill's high grade grain construction makes the drill head uneven, making it easier to drill.3. No Deformation: The high quality core steel body of the drill helps to improve the durability and work efficiency of the drill, and it will not deform for a long time.4. Suitable for High Speed Tools: When using a brazed dry drill bit, the faster the power tool rotates, the better the hole will be.5. Wide Application: This drill is suitable for drilling holes in all ceramic tiles, vitrified tiles, marble, granite, microcrystalline stone, ordinary glass, ceramics, quartz stone and other materials.Specification:Item Type: Brazed Dry Drill BitMaterial: Brazed DiamondColor: Blue and GoldenBrazing Dry Drill Bit Specifications: Approx. 5mm / 0.2in, Approx. 6mm / 0.24in, Approx. 8mm / 0.31in, Approx. 10mm / 0.39in, Approx. 12mm / 0.47inTriangle Drill Specifications: Approx. 6mm / 0.24inUses: Suitable for perforating all ceramic tiles, vitrified tiles, marble, granite microcrystalline stone, ordinary glass, ceramics, quartz stone and other materials. Package List:5 x Brazed Dry Drill Bit1 x DrillNote:1.The brazed dry drill bit cannot be pressed down hard, otherwise the hole saw will be easily damaged.2.When using brazed dry drill bit, the speed of power tools should not be less than 2000 rmp