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). Drill Bit: Diameter 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. Note: 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. Other Diamond Tools i. Router bits, engraving bits, mouted points…. Please kindly wait if it is delayed, thank you! 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. These products are marked with our brand. Customized service: If you order 20 pieces and above, we can mark your brand name on the product if you want. Your encouragement and support is our motivation to keep moving forward.