<p>The diamond drill bit uses vacuum brazing technology that allows it to be used at a higher temperature to easily cut through hard porcelain tiles, ceramics, marble and slate. Built-in lubricant aids in cooling and extends the life, meaning no additional lubricant is needed. Vacuum Brazed Diamond Drill Bits, Dry Drilling Granite \u0026 Marble, Masonry, Concrete, Tile\/Ceramic, Glass, Hard Plastic. Hex Shank, Prevents Slippage in Chuck. Laser Etched Diameter on Body for Easy Identification.Item Descriptions:-Brand New.-The diamond drill bit uses vacuum brazing technology that allows it to be used at a higher temperature to easily cut through hard porcelain tiles, ceramics, marble and slate.-Built-in lubricant aids in cooling and extends the life, meaning no additional lubricant is needed.-Vacuum Brazed Diamond Drill Bits, Dry Drilling Granite \u0026 Marble, masonry, concrete, tile\/ceramic, glass, hard plastic.-Hexagonal shank, prevents slipping in chuck.-Laser engraved, diameter on body for easy identification.Package:3x Dry Diamond Drill BitItem Specifications:Diameter: 6mm 8mm 10mmMaterial: MetalQuantity:3 pc</p> <p>Note: The data are all manual measurements, please allow 1 - 3cm error, due to the difference in light and display, there will be a certain color difference, whichever is the actual object received.</p>