SAFE & SECURE SHOPPING. Diamond Core Drill Bit Set Grinder Drill Bit M14 for Ceramic Tile Ø25/35/50/68mm. Vacuum brazed diamond drilling bits for stone. Diameter 25/35/50/68mm , M14 connection, Total Length 60MM. Dry drilling for porcelain tile, granite, marble, stone. Wax inside to cool the drill when working. Fast and Smooth drilling. Long and life time. Less loss of material. Other available diameter: Dia6mm, 8mm, 10mm, 12mm, 14mm, 16mm, 20mm, 25mm, 28mm, 32mm, 35mm, 40mm, 45mm, 50mm, 55mm, 60mm, 65mm, 75mm, 90mm, 100mm. 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: If you order 20pcs we could mark your brand name on our products. It is our vision and mission to provide innovative products that satisfy you with the best service and competitive prices. Our goal is to ensure that you find exactly what you need and that it is easy for you to place your order. Diamond Drilling Bit/ Diamond Saw Blade/ Diamond Milling Bit/ Diamond Finger Bit/ Diamond Grinding Wheel/ Diamond Polishing Pad/ Other Accessory. We will track the logistics information for you and reply you in time, hope to make you have a satisfactory shopping experience. If you need to return an item, please check it twice to make sure the item is not working properly. Please make sure the item has no human damage. Used items will not be accepted for return.