One set Vacuum brazed diamond core bits with Box, professional quality. 13pcs products with box. Diameter 6mm 8mm 10mm 12mm 16mm 20mm 25mm 30mm 35mm 45mm 55mm 68mm 100mm Drill Bit. Each size one piece. 6mm 8mm 10mm 12mm 16mm 20mm 25mm 30mm 35mm 45mm 55mm 68mm 100mm. Total length: 60mm, Connection: M14 Thread, Diamond height 10MM. Drill Bit: Dry/wet drilling for porcelain tile, granite, marble, ceramic. Vacuum brazed technology provide high efficient working performance. Fast and Smooth drilling. Less loss of material. Adapter: Good quality steel, long life, and Surface Nickel plating. These products are marked with our brand. If you do not want our brand name, please leave us message, we could send you products without brand. Customize service: we could mark your brand name on our products. Diamond Saw Blades –Diamond Grinding Wheel. Diamond Polishing Pads –Diamond Drilling Bits. Other Diamond Tools i. Router bits, engraving bits, mouted points…. Europe UK, France, Germany, Spain, Filand, Italy, Netherland, Prtugal, Swizerland, Sweden, Bulgiem, Ireland, Czech…. Most parcel can be tracked on 17track. We will provide great aftersales service. If you need some technic support, we may help you. Some feedback helped us improve our quality, you will be rewarded free gifts, thank you. Customize service: If you order 20pcs we could mark your brand name on our products. Use our Tools for Right Application. Ensure Right fitting and good machine condition. Ensure tools rotating less than Max RPM or working under recommend speed. Necessary protection method should be applied, for example safe-guard for saw blade, put on gloves, glasses… Please allow 1-3mm errors due to manual measurement. Item color displayed in photos may be showing slightly different on your computer monitor since monitors are not calibrated same. We will do our best to solve any problems and provide you with the best customer services. Your encouragement and support is our continuously forward momentum. Thank you very much!