Features: brand new and high quality ● Easy to use: 6-16mm ceramic tile drill bits are used for non-mechanical dry drilling of porcelain grills and tiles. To make the work easier, you must have an angle of about 10 degrees. 45° drill, then gradually put the drill in an upright position. ● General: Our 6-16 mm diamond drill bits are suitable for processing stoneware, ceramics, hard ceramic tiles, stone, granite, and marble. Diamond drill bits are suitable for industrial use and household use under hard working conditions. ● Preferred material: high-quality diamond, chromium vanadium steel, strong and durable. ● Suggestion: In order to avoid overheating and causing drill bit failure, the maximum speed of the drill bit should not exceed 800 R-PM. ● Suitable for electric hand drills and for bench drills: The ceramic tile drill has an elongated shape, so it can be used with drills and screwdrivers from different manufacturers. Specifications: Material:Diamond+Chromium Vanadium Steel Color ：Orange Size1: Approx.10mm/ 0.39inch Size2: Approx.12mm/0.47inch Size3: Approx.14mm/0.55inch Size4: Approx.16mm/0.62inch Size5: Approx.6mm/0.23inch Size6: Approx.8mm/0.31inch Package Includes: 1PcxAll-ceramic Tiles Drill Bit note: 1.Please allow 1-2mm errors due to manual measurement, make sure that you do not mind before you order. 2.Due to the difference between different monitors, the picture may not reflect the actual color of the item.