Feature: 1. Robust Brazing Technology: This diamond core drill bit ensures exceptional durability and stability during the drilling process. The strong connection between the thread and the drill bit ensures long lasting performance even with heavy usage. 2. High Accuracy Tooth Design: Featuring a high accuracy tooth configuration, this dry drill bit enables accurate and efficient drilling in various materials. Effortlessly cut through tiles, granite, marble, and bricks, delivering cleaner and smoother hole finishes every time. 3. Diamond Coating: Enhanced with a premium diamond coating, this drill bit offers unparalleled cutting ability and wear resistance. The embedded diamonds on the surface maintain sharpness for extended periods, ensuring consistent performance across numerous projects. 4. Wide Range of Applications: Suitable for professionals and enthusiasts, the brazing dry drill bit covers a wide range of applications. Whether renovating kitchens, bathrooms, or working on construction sites, this drill bit is the perfect tool to meet all your brick and stone drilling needs. 5. 12 Drill Bit Sizes, 6 to 35mm: With 12 different sizes available, ranging from 6mm to 35mm, this drill bit caters to various requirements, providing versatility and flexibility for different projects. Specification: Item Type: Diamond Hole Saw Kit Material: Carbon Steel Product Specification: 6mm / 0.24in, 8mm / 0.31in, 10mm / 0.39in, 12mm / 0.47in, 14mm / 0.55in, 16mm / 0.63in, 18mm / 0.71in, 20mm / 0.79in, 22mm / 0.87in, 25mm / 0.98in, 30mm / 1.18in, 35mm / 1.38in . Package List: 12 x Drill Bits 1 x Storage Box Note: Add water when punching holes; tilt at a 45° angle first, then straighten and punch.